publicationDate stringlengths 1 2.79k | title stringlengths 1 36.5k ⌀ | abstract stringlengths 1 37.3k ⌀ | id stringlengths 9 47 |
|---|---|---|---|
2020-09-28 | Intrusion of MeV-TeV Cosmic-Rays into Molecular Clouds Studied by Ionization, the Neutral Iron Line, and Gamma-Rays | Low-energy (~MeV) cosmic rays (CRs) ionize molecular clouds and create the
neutral iron line (Fe I K\alpha) at 6.4 keV. On the other hand, high-energy (>~
GeV) CRs interact with the dense cloud gas and produce gamma rays. Based on a
one-dimensional model, we study the spatial correlation among ionization rates
of gas, ... | 2009.13524v3 |
2020-10-02 | Singular magnetic anisotropy in the nematic phase of FeSe | FeSe is arguably the simplest, yet the most enigmatic, iron-based
superconductor. Its nematic but non-magnetic ground state is unprecedented in
this class of materials and stands out as a current puzzle. Here, our NMR
measurements in the nematic state of mechanically detwinned FeSe reveal that
both the Knight shift and... | 2010.01020v1 |
2020-10-05 | Magnetic Iron Nanocubes Effectively Capture Epithelial and Mesenchymal Cancer Cells | Current methods for capturing circulating tumor cells (CTCs) are based on the
overexpression of cytokeratin (CK) or epithelial cell-adhesion molecule (EpCAM)
on cancer cells. However, during the process of metastasis, tumor cells undergo
epithelial to mesenchymal transition (EMT) that can lead to the loss of
CK/EpCAM e... | 2010.02129v1 |
2020-10-14 | An extremely metal-deficient globular cluster in the Andromeda Galaxy | Globular clusters (GCs) are dense, gravitationally bound systems of thousands
to millions of stars. They are preferentially associated with the oldest
components of galaxies, and measurements of their composition can therefore
provide insight into the build-up of the chemical elements in galaxies in the
early Universe.... | 2010.07395v1 |
2020-11-20 | Photoionization Models for High Density Gas | Relativistically broadened and redshifted 6.4 -- 6.9 keV iron K lines are
observed from many accretion powered objects, including X-ray binaries and
active galactic nuclei (AGN). Existence of gas close to the central engine
implies large radiation intensities and correspondingly large gas densities if
the gas is to rem... | 2011.10603v2 |
2020-12-18 | Observation of d-wave Pomeranchuk nematic order in floating monolayer FeSe on FeSe/STO | As a foundation of condensed matter physics, the normal states of most metals
are successfully described by Landau Fermi liquid theory with quasi-particles
and their Fermi surfaces (FSs). The FSs sometimes become deformed or gapped at
low temperatures owing to quasi-particle interactions, known as FS
instabilities. A n... | 2012.10136v1 |
2020-12-19 | Majorana bound states in vortex lattices on iron-based superconductors | Majorana quasi-particles may arise as zero-energy bound states in vortices on
the surface of a topological insulator that is proximitized by a conventional
superconductor. Such a system finds its natural realization in the iron-based
superconductor FeTe$_{0.55}$Se$_{0.45}$ that combines bulk $s$-wave pairing
with spin ... | 2012.10588v2 |
2020-12-29 | Supernova neutrino detection through neutron emission by nuclei | Neutrinos from core collapse supernovae can excite nuclei of some detector
materials beyond their neutron emission thresholds. Detection of these neutrons
can give valuable information about the supernova explosion mechanism and
possibly also throw light on neutrino properties. In this article, we give a
brief review o... | 2012.14888v1 |
2021-01-07 | An injectable, self-healing and MMP-inhibiting hyaluronic acid gel via iron coordination | Regulating the activity of matrix metalloproteinases (MMPs) is a potential
strategy for osteoarthritis (OA) therapy, although delivering this effect in a
spatially and temporally localised fashion remains a challenge. Here, we report
an injectable and self-healing hydrogel enabling factor-free MMP regulation and
biomec... | 2101.02414v1 |
2021-01-26 | Superconductivity at 40 K in lithiation-processed [(Fe,Al)(OH)2][FeSe]1.2 with a layered structure | Exploration of new superconductors has always been one of the research
directions in condensed matter physics. We report here a new layered
heterostructure of [(Fe,Al)(OH)2][FeSe]1.2, which is synthesized by the
hydrothermal ion-exchange technique. The structure is suggested by a
combination of X-ray powder diffraction... | 2101.10641v1 |
2021-04-08 | The EOS/Resolution Conspiracy: Convergence in Proto-Planetary Collision Simulations | We investigate how the choice of equation of state (EOS) and resolution
conspire to affect the outcomes of giant impact (GI) simulations. We focus on
the simple case of equal mass collisions of two Earth-like $0.5\,M_\oplus$
proto-planets showing that the choice of EOS has a profound impact on the
outcome of such colli... | 2104.03559v2 |
2021-04-22 | Chemical composition of stars with massive planets | Stellar parameters of 25 planet-hosting stars and abundances of Li, C, O, Na,
Mg, Al, S, Si, Ca, Sc, Ti, V, Cr, Mn, Fe, Ni, Zn, Y, Zr, Ba, Ce, Pr, Nd, Sm and
Eu, were studied based on homogeneous high resolution spectra and uniform
techniques. The iron abundance [Fe/H] and key elements (Li, C, O, Mg, Si)
indicative of ... | 2104.10894v1 |
2021-05-02 | High-energy magnetic excitations from heavy quasiparticles in CeCu$_2$Si$_2$ | Magnetic fluctuations is the leading candidate for pairing in cuprate,
iron-based and heavy fermion superconductors. This view is challenged by the
recent discovery of nodeless superconductivity in CeCu$_2$Si$_2$, and calls for
a detailed understanding of the corresponding magnetic fluctuations. Here, we
mapped out the... | 2105.00387v1 |
2021-05-19 | An examination of local strain fields evolution in ductile cast iron through micromechanical simulations based on 3D imaging | Microscopic digital volume correlation (DVC) and finite element
precoalescence strain evaluations are compared for two nodular cast iron
specimens. Displacement fields from \textit{in-situ} 3D synchrotron
laminography images are obtained by DVC. Subsequently the microstructure is
explicitely meshed from the images cons... | 2105.09859v3 |
2021-05-24 | The Surface of (16) Psyche from Thermal Emission and Polarization Mapping | The asteroid (16) Psyche is the largest of the M-type asteroids, which have
been hypothesized to be the cores of disrupted planetesimals and the parent
bodies of the iron meteorites. While recent evidence has collected against a
pure metal composition for Psyche, its spectrum and radar properties remain
anomalous. We o... | 2105.11372v1 |
2021-08-03 | Spectroscopy and structural investigation of iron phosphorus trisulfide -- FePS$_3$ | Lamellar structures of transition metal phosphorus trisulfides possess strong
intralayer bonding, albeit adjacent layers are held by weak van der Waals
interactions. Those compounds received enormous interest due to their unique
combination of optical and long-range magnetic properties. Among them, iron
phosphorus tris... | 2108.01742v3 |
2021-08-08 | V488 Per revisited: no strong mid-infrared emission features and no evidence for stellar/sub-stellar companions | We present characterization of the planetary system architecture for V488
Per, the dustiest main sequence star known with a fractional infrared
luminosity of ~16%. Far-infrared imaging photometry confirms the existence of
an outer planetary system dust population with blackbody-fit temperature of
~130 K. Mid-infrared s... | 2108.03700v1 |
2021-08-20 | Orbital-dependent modulation of the superconducting gap in uniaxially strained Ba$_{0.6}$K$_{0.4}$Fe$_2$As$_2$ | Pairing symmetry which characterizes the superconducting pairing mechanism is
normally determined by measuring the superconducting gap structure
($|\Delta_k|$). Here, we report the measurement of a strain-induced gap
modulation ($\partial|\Delta_k|$) in uniaxially strained
Ba$_{0.6}$K$_{0.4}$Fe$_2$As$_2$ utilizing angl... | 2108.08986v1 |
2021-08-25 | Synthesis of a High-Capacity α-Fe2O3@C Conversion Anode and a High-Voltage LiNi0.5Mn1.5O4 Spinel Cathode and Their Combination in a Li-Ion Battery | A Li-conversion alpha-Fe2O3@C nanocomposite anode and a high-voltage
LiNi0.5Mn1.5O4 cathode are synthesized in parallel, characterized, and combined
in a Li-ion battery. alpha-Fe2O3@C is prepared via annealing of maghemite iron
oxide and sucrose under an argon atmosphere and subsequent oxidation in air.
The nanocomposi... | 2108.11314v1 |
2021-08-25 | Magnetic properties of BiFeO$_3$-BaTiO$_3$ ceramics in the morphotropic phase boundary: a role of crystal structure and structural parameters | A correlation between the crystal structure and magnetic properties of system
(1-x)BiFeO$_3$-(x)BaTiO$_3$ with compounds across the morphotropic phase
boundary was studied using X-ray and neutron diffraction, magnetometry, and
Mossbauer spectroscopy measurements. Increase in the dopants content leads to
the structural ... | 2108.11447v1 |
2021-08-30 | Thermodynamic Signatures of Diagonal Nematicity in RbFe$_2$As$_2$ Superconductor | Electronic nematic states with broken rotational symmetry often emerge in
correlated materials. In most iron-based superconductors, the nematic
anisotropy is oriented in the Fe-Fe direction of the iron square lattice.
Recently, a novel type of nematicity along the diagonal Fe-As direction has
been suggested in heavily ... | 2108.13081v1 |
2021-09-03 | A stellar census in globular clusters with MUSE. A new perspective on the multiple main sequences of $ω$ Centauri | $\omega$ Cen is a rare example of a globular cluster where the iron abundance
of the stars spans more than one order of magnitude. Many spectroscopic
investigations of its red-giant- and sub-giant- branches have revealed multiple
peaks in the iron abundance distribution. The metallicity distribution of
main-sequence (M... | 2109.01540v2 |
2021-09-09 | Collisional mixing between inner and outer solar system planetesimals inferred from the Nedagolla iron meteorite | The ungrouped iron meteorite Nedagolla is the first meteorite with bulk Mo,
Ru, and Ni isotopic compositions that are intermediate between those of the
non-carbonaceous (NC) and carbonaceous (CC) meteorite reservoirs. The Hf-W
chronology of Nedagolla indicates that this mixed NC-CC isotopic composition
was established ... | 2109.04224v1 |
2021-09-11 | NuSTAR monitoring of MAXI J1348-630: evidence of high density disc reflection | We present the broadband spectral analysis of all the six hard, intermediate
and soft state NuSTAR observations of the recently discovered transient black
hole X-ray binary MAXI J1348-630 during its first outburst in 2019. We first
model the data with a combination of a multi-colour disc and a relativistic
blurred refl... | 2109.05380v1 |
2021-09-14 | Ultrafast Optical Spectroscopy Evidence of Pseudogap and Electron-Phonon Coupling in an Iron-Based Superconductor KCa$_2$Fe$_4$As$_4$F$_2$ | We use ultrafast optical spectroscopy to study the nonequilibrium
quasiparticle relaxation dynamics of the iron-based superconductor
KCa$_2$Fe$_4$As$_4$F$_2$ with $T_c=33.5$ K. Our results reveal a possible
pseudogap ($\Delta_{PG}$ = 2.4 $\pm$ 0.1 meV) below $T^*\approx 50$ K but prior
to the opening of a superconducti... | 2109.06460v2 |
2021-09-27 | The Three-Dimensional Electronic Structure of LiFeAs: Strong-coupling Superconductivity and Topology in the Iron Pnictides | Amongst the iron-based superconductors, LiFeAs is unrivalled in the
simplicity of its crystal structure and phase diagram. However, our
understanding of this canonical compound suffers from conflict between mutually
incompatible descriptions of the material's electronic structure, as derived
from contradictory interpre... | 2109.13276v1 |
2021-10-12 | Vortex dynamics and second magnetization peak in the iron-pnictide superconductor Ca$_{0.82}$La$_{0.18}$Fe$_{0.96}$Ni$_{0.04}$As$_2$ | We report the studies of detailed magnetic relaxation and isothermal
magnetization measurements in the vortex state of the 112-type iron-pnictide
Ca$_{0.82}$La$_{0.18}$Fe$_{0.96}$Ni$_{0.04}$As$_2$ superconductor with $T_c$
$\sim$ 22 K. In the isothermal $M(H)$, a well defined second magnetization peak
(SMP) feature is ... | 2110.05677v1 |
2021-10-19 | Generalized estimates for the density of oxide scale in the range from 0 C to 1300 C | Oxide scale formed on the surface of steel products during high-teperature
processes is studied as a composite material, the main solid components of
which, in general, are wustite, magnetite, hematite and metallic iron. To
estimate the density of each of these components in the temperature range from
0 C to 1300 C, fo... | 2110.09791v1 |
2021-10-26 | Stochastic Low Frequency Variability in 3-Dimensional Radiation Hydrodynamical Models of Massive Star Envelopes | Increasing main sequence stellar luminosity with stellar mass leads to the
eventual dominance of radiation pressure in stellar envelope hydrostatic
balance. As the luminosity approaches the Eddington limit, additional
instabilities (beyond conventional convection) can occur. These instabilities
readily manifest in the ... | 2110.13944v1 |
2021-12-01 | Orbital-Selective High-Temperature Cooper Pairing Developed in the Two-Dimensional Limit | The orbital multiplicity in multiband superconductors yields orbital
differentiation in normal-state properties, and can lead to orbital-selective
spin-fluctuation Cooper pairing. This phenomenon has become increasingly
pivotal in clarifying the pairing 'enigma' particularly for multiband
high-temperature superconducto... | 2112.00383v1 |
2021-12-05 | Optical singly-ionized iron emission in radio-quiet and relativistically jetted active galactic nuclei | The issue of the difference between optical and UV properties of radio-quiet
and radio-loud (relativistically "jetted") active galactic nuclei (AGN) is a
long standing one, related to the fundamental question of why a minority of
powerful AGN possess strong radio emission due to relativistic ejections. This
paper exami... | 2112.02632v1 |
2021-12-10 | Random-strain-induced correlations in materials with intertwined nematic and magnetic orders | Electronic nematicity is rarely observed as an isolated instability of a
correlated electron system. Instead, in iron pnictides and in certain cuprates
and heavy-fermion materials, nematicity is intertwined with an underlying
spin-stripe or charge-stripe state. As a result, random strain, ubiquitous in
any real crystal... | 2112.05769v1 |
2021-12-15 | A Suzaku sample of unabsorbed narrow-line and broad-line Seyfert 1 galaxies: II. Iron emission and absorption | A sample of 22 narrow-line Seyfert 1 (NLS1) and 47 broad-line Seyfert 1
(BLS1) galaxies observed with Suzaku is used to examine the Fe K band
properties of each group. Three different models are used to examine the
presence of: narrow neutral Fe Ka line at 6.4 keV and ionised Fe xxv and Fe
xxvi emission lines (model A)... | 2112.08127v1 |
2021-12-15 | Stellar population astrophysics (SPA) with the TNG -- The chemical content of the red supergiant population in the Perseus complex | Context. The Perseus complex in the outer disk of the Galaxy hosts a number
of clusters and associations of young stars. Gaia is providing a detailed
characterization of their kinematic structure and evolutionary properties.
Aims. Within the SPA Large Programme at the TNG, we secured HARPS-N and GIANO-B
high-resolution... | 2112.08402v1 |
2021-12-28 | Simulations of globular clusters within their parent galaxies: Metallicity spreads and anomalous precursor populations | Recent observations of globular clusters (GCs) suggest that elemental
abundance variations may exist between first-generation (1G) stars. We propose
that metal abundance ('metallicity') spreads within GC forming giant molecular
clouds (GMCs) can influence the iron abundances of future cluster members. To
investigate th... | 2112.13971v1 |
2022-01-04 | Reconstruction of Air-Shower Parameters Through the Lateral Distribution Function of Ultra-High Energy Particles | In this study, the necessity of the simulation study for exploring the
interactions of ultra-high energy particles cosmic rays was examined. Different
hadronic interaction models such as (SIBYLL, QGSJET, and EPOS) were simulated
by using air showers simulation AIRES system (version 19.04.00). Also, the
charged particle... | 2201.01368v1 |
2022-02-01 | Optical Properties of C$-$rich ($^{12}$C, SiC and FeC) Dust Layered Structure of Massive Stars | The composition and structure of interstellar dust are important and complex
for the study of the evolution of stars and the \textbf{interstellar medium}
(ISM). However, there is a lack of corresponding experimental data and model
theories. By theoretical calculations based on ab-initio method, we have
predicted and ge... | 2202.00260v1 |
2022-01-30 | Ultrahigh-Pressure Magnesium Hydrosilicates as Reservoirs of Water in Early Earth | The origin of water on the Earth is a long-standing mystery, requiring a
comprehensive search for hydrous compounds, stable at conditions of the deep
Earth and made of Earth-abundant elements. Previous studies usually focused on
the current range of pressure-temperature conditions in the Earth's mantle and
ignored a po... | 2202.00752v1 |
2022-03-30 | The Chemical Composition of Extreme-Velocity Stars | Little is known about the origin of the fastest stars in the Galaxy. Our
understanding of the Milky Way and surrounding dwarf galaxies chemical
evolution history allows us to use the chemical composition of a star to
investigate its origin, and say whether a star was formed in-situ or was
accreted. However, the fastest... | 2203.16364v1 |
2022-04-08 | Estimation of Nitrogen-to-Iron Abundance Ratios From Low-Resolution Spectra | We present a method to determine nitrogen abundance ratios with respect to
iron ([N/Fe]) from molecular CN-band features observed in low-resolution ($R
\sim$ 2000) stellar spectra obtained by the Sloan Digital Sky Survey (SDSS) and
the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST). Various
tests ar... | 2204.03933v1 |
2022-04-08 | Possible Implications of Relatively High Levels of Initial $^{60}$Fe in Iron Meteorites for the Non-Carbonaceous -- Carbonaceous Meteorite Dichotomy and Solar Nebula Formation | Cook et al. (2021) found that iron meteorites have an initial abundance ratio
of the short-lived isotope $^{60}$Fe to the stable isotope $^{56}$Fe of
$^{60}$Fe/$^{56}$Fe $\sim$ $(6.4 \pm 2.0) \times 10^{-7}$. This appears to
require the injection of live $^{60}$Fe from a Type II supernova (SN II) into
the presolar mole... | 2204.04134v1 |
2022-04-21 | Ferrous Metal Matrix Composites Status Scope and Challenges | The present paper is an effort to culminate the status, scopes and challenges
in the development of ferrous metal matrix composites (FMMCs). The FMMCs are
old but less in use than the non-ferrous metal matrix composites (NFMMCs), as
far as literature and actual applications are concerned. Therefore, this
stimulates the... | 2204.09999v2 |
2022-04-21 | Detection of CO emission lines in the dayside atmospheres of WASP-33b and WASP-189b with GIANO | Ultra-hot Jupiters (UHJs) are expected to possess temperature inversion
layers in their dayside atmospheres. Recent thermal emission observations have
discovered several atomic and molecular species along with temperature
inversions in UHJs. We observed the thermal emission spectra of two UHJs
(WASP-33b and WASP-189b) ... | 2204.10158v1 |
2022-05-17 | A Disc Reflection Model for Ultra-Soft Narrow-Line Seyfert 1 Galaxies | We present a detailed analysis of the XMM-Newton observations of five
narrow-line Seyfert 1 galaxies (NLS1s). They all show very soft continuum
emission in the X-ray band with a photon index of $\Gamma\gtrsim 2.5$.
Therefore, they are referred to as `ultra-soft' NLS1s in this paper. By
modeling their optical/UV-X-ray s... | 2205.08236v1 |
2022-05-28 | Spectral Evidence for Unidirectional Charge Density Wave in Detwinned BaNi$_2$As$_2$ | The emergence of unconventional superconductivity in proximity to intertwined
electronic orders is especially relevant in the case of iron-based
superconductors. Such order consists of an electronic nematic order and a spin
density wave in these systems. BaNi$_2$As$_2$, like its well-known iron-based
analog BaFe$_2$As$... | 2205.14339v1 |
2022-06-02 | Lithium detection in red supergiant stars of the Perseus complex | We present the first systematic study of lithium abundance in a chemically
homogeneous sample of 27 red supergiants (RSGs) in the young Perseus complex.
For these stars, accurate stellar parameters and detailed chemical abundances
of iron and iron peak, CNO, alpha, light and neutron-capture elements have been
already o... | 2206.01218v1 |
2022-06-15 | Hyperfine fields at $^{66}$Ga, $^{67,69}$Ge implanted into iron and gadolinium hosts at 6 K, and applications to g-factor measurements | Isomers in $^{66}$Ga, $^{67}$Ge, and $^{69}$Ge were recoil-implanted into
ferromagnetic hosts of iron and gadolinium at $\approx 6$~K, and the hyperfine
magnetic fields were determined by Time Differential Perturbed Angular
Distribution (TDPAD) measurements. The hyperfine field strengths at $\approx
6$~K are compared t... | 2206.07294v1 |
2022-06-23 | Size-dependent Failure Behavior of Lithium-Iron Phosphate Battery under Mechanical Abuse | Under mechanical abuse conditions, the failure of lithium-ion batteries
occurs in various stages characterized by different force, temperature and
voltage response which require it's in-situ measurements for analysis. Firstly,
four sizes of commercially available lithium-iron phosphate batteries (LFPB)
viz. 18650, 2265... | 2206.11732v2 |
2022-08-03 | Light-induced dynamics of liquid-crystalline droplets on the surface of iron-doped lithium niobate crystals | We investigated the effect of a photovoltaic field generated on the surface
of iron-doped lithium niobate crystals on droplets of a ferroelectric nematic
liquid crystalline and a standard nematic liquid crystalline material deposited
on this surface. When such assembly is illuminated with a laser beam, a wide
range of ... | 2208.02318v1 |
2022-09-07 | Transport evidence for the surface state and spin-phonon interaction in FeTe$_{0.5}$Se$_{0.5}$ | The iron chalcogenides have been proved to be intrinsic topological
superconductors to implement quantum computation because of their unique
electronic structures. The topologically nontrivial surface states of
FeTe$_{0.5}$Se$_{0.5}$ have been predicted by several calculations and then
confirmed by high-resolution phot... | 2209.03267v2 |
2022-09-14 | Structural peculiarities of $\varepsilon$-Fe$_2$O$_3$ / GaN epitaxial layers unveiled by high-resolution transmission electron microscopy and neutron reflectometry | The present paper is dedicated to the structural study of crystallographic
peculiarities appearing in epitaxial films of metastable epsilon iron oxide
($\varepsilon$-Fe$_2$O$_3$) grown by pulsed laser deposition onto a
semiconductor GaN (0001) substrate. The columnar structure of the nanoscale
$\varepsilon$-Fe$_2$O$_3$... | 2209.06460v1 |
2022-09-15 | Spin-charge coupling and decoupling in perovskite-type iron oxides (Sr$_{1-x}$Ba$_x$)$_{2/3}$La$_{1/3}$FeO$_3$ | The perovskite-type iron oxide Sr$_{2/3}$La$_{1/3}$FeO$_3$ is known to show
characteristic spin-charge ordering (SCO), where sixfold collinear spin
ordering and threefold charge ordering are coupled with each other. Here, we
report the discovery of a spin-charge decoupling and an antiferromagnetic (AFM)
state competing... | 2209.07310v1 |
2022-09-18 | Revisit the Circumnuclear X-ray Emission of NGC 2992 in a Historically Low State | The inner-most region of the Seyfert galaxy NGC 2992 has long been suspected
to be the location of intense AGN-host galaxy interaction, but photon pile-up
in previous high-resolution observations hampered the study of soft X-ray
excess and the interaction near its nucleus. We present an X-ray imaging
spectroscopic anal... | 2209.08534v1 |
2022-09-18 | Efficient photocatalytic nitrogen fixation from air under sunlight via iron-doped WO$_3$ | Photocatalytic nitrogen fixation from air directly under sunlight can
contribute significantly to carbon neutralization. It is an ideal pathway to
replace the industrial Haber Bosch process in future. A Fe-doped layered WO$_3$
photocatalyst containing oxygen vacancies was developed which can fix nitrogen
from air direc... | 2209.08547v1 |
2022-09-30 | Charge Transport in Ba$_{1-x}$Rb$_{x}$Fe$_{2}$As$_{2}$ Single Crystals | Recent studies in heavily hole-doped iron-based superconductor RbFe$_2$As$_2$
have suggested the emergence of novel electronic nematicity directed along the
Fe-As direction, 45$^\circ$ rotated from the usual nematicity ubiquitously
found in BaFe$_2$As$_2$ and related materials. This motivates us to study the
physical p... | 2209.15526v1 |
2022-10-20 | Kinetics of transformation, border of metastable miscibility gap in Fe-Cr alloy and limit of Cr solubility in iron at 858 K | The study was aimed at determination of the position of the Fe-rich border of
the metastable miscibility gap (MMG) and of the solubility limit of Cr in iron
at 858 K. Towards this end a Fe73.7Cr26.3 alloy was isothermally annealed at
858 K in vacuum up to 8144 hours and M\"ossbauer spectra were recorded at room
tempera... | 2210.11550v1 |
2022-11-04 | Unusual Abundances from Planetary System Material Polluting the White Dwarf G238-44 | Ultraviolet and optical spectra of the hydrogen-dominated atmosphere white
dwarf star G238-44 obtained with FUSE, Keck/HIRES, HST/COS, and HST/STIS reveal
ten elements heavier than helium: C, N, O, Mg, Al, Si, P, S, Ca, and Fe.
G238-44 is only the third white dwarf with nitrogen detected in its atmosphere
from pollutin... | 2211.02673v1 |
2022-11-09 | Asynchronous accretion can mimic diverse white dwarf pollutants I: core and mantle fragments | Polluted white dwarfs serve as astrophysical mass spectrometers - their
photospheric abundances are used to infer the composition of planetary objects
that accrete onto them. We show that due to asymmetries in the accretion
process, the composition of the material falling onto a star may vary with time
during the accre... | 2211.05114v1 |
2022-11-21 | Discontinuous Shear Thickening (DST) transition with spherical iron particles coated by adsorbed brush polymer | In this work we explore the rheology of very concentrated (0.55<$\Phi$<0.67)
suspensions of carbonyl iron (CI) particles coated by a small polymer. A strong
DST is observed in a large range of volume fraction presenting some
specificities relatively to other systems. In particular, in a given range of
volume fraction, ... | 2211.11807v1 |
2022-12-03 | Electron correlation in the Iron(II) Porphyrin by NOF approximations | The relative stability of the singlet, triplet, and quintet spin states of
Iron(II) porphyrin (FeP) represents a challenging problem for electronic
structure methods. While it is currently accepted that the ground state is a
triplet, multiconfigurational wavefunction-based methods predict a quintet, and
density functio... | 2212.01640v1 |
2022-12-13 | Collapse of Metallicity and High-$T_c$ Superconductivity in the High-Pressure phase of FeSe$_{0.89}$S$_{0.11}$ | We investigate the high-pressure phase of the iron-based superconductor
FeSe$_{0.89}$S$_{0.11}$ using transport and tunnel diode oscillator studies. We
construct detailed pressure-temperature phase diagrams that indicate that
outside of the nematic phase, the superconducting critical temperature reaches
a minimum befor... | 2212.06824v1 |
2022-12-21 | Post-Synthetic Treatment of Nickel-Iron Layered Double Hydroxides for the Optimum Catalysis of the Oxygen Evolution Reaction | Nickel-iron layered double hydroxide (NiFe LDH) platelets with high
morphological regularity and sub-micrometre lateral dimensions were synthesized
using a homogeneous precipitation technique for highly efficient catalysis of
the oxygen evolution reaction (OER). Considering edge sites are the point of
activity, efforts... | 2212.11378v1 |
2023-01-03 | Extracting optical parameters of Cu-Mn-Fe spinel oxide nanoparticles for optimizing air-stable, high-efficiency solar selective coatings | High-temperature Cu-Mn-Fe spinel-oxide nanoparticle solar selective absorber
coatings are investigated experimentally and theoretically. A reliable, general
approach to evaluate absorption coefficient spectra from the optical
measurements of the nanoparticle-pigmented coatings is developed based on
solving the inverse ... | 2301.01194v1 |
2023-01-07 | Orthogonal magnetic structures of Fe4O5:representation analysis and DFT calculations | The magnetic and electronic structures of Fe4O5 have been investigated at
ambient and high pressures via a combination of representation analysis,
density functional theory (DFT+U) calculations, and M\"ossbauer spectroscopy. A
few spin configurations corresponding to the different irreducible
representations have been ... | 2301.02824v1 |
2023-02-03 | An empirical relation to estimate host galaxy stellar light from AGN spectra | Measurement of black hole mass for low-$z$ ($z\leq 0.8$) Active Galactic
Nuclei (AGNs) is difficult due to the strong contribution from host galaxy
stellar light necessitating detailed spectral decomposition to estimate the AGN
luminosity. Here, we present an empirical relation to estimate host galaxy
stellar luminosit... | 2302.01948v2 |
2023-02-13 | Evolution of phase morphology in dispersed clay systems under the microwave irradiation | The results of a study of the effect of microvolume emission (power 700 W,
frequency 2.45 GHz) on the structural changes in natural clay particles are
presented. The influence of the irradiation time (10 and 20 minutes) and the
environment in the microwave chamber (atmospheric air and air saturated with
water vapor) on... | 2302.06330v1 |
2023-03-01 | A Search for Chemical Anomalies of Seven A-types Stars | We present a chemical abundance analysis of seven A-type stars with no
detailed chemical abundance measurements in the literature. High-resolution
spectra of the targets HD 2924, HD 4321, HD 26553, HD 125658, HD 137928, HD
154713, and HD 159834 were obtained using the Coude Echelle Spectrograph at the
TUBITAK National ... | 2303.00584v1 |
2023-05-29 | Intertwined charge and pair density orders in a monolayer high-Tc iron-based superconductor | Symmetry-breaking electronic phase in unconventional high-temperature
(high-Tc) superconductors is a fascinating issue in condensed-matter physics,
among which the most attractive phases are charge density wave (CDW) phase with
four unit-cell periodicity in cuprates and nematic phase breaking the C4
rotational symmetry... | 2305.17991v1 |
2023-06-22 | Type Ia Supernova Nucleosynthesis: Metallicity-Dependent Yields | Type Ia supernova explosions (SNIa) are fundamental sources of elements for
the chemical evolution of galaxies. They efficiently produce intermediate-mass
(with Z between 11 and 20) and iron group elements - for example, about 70% of
the solar iron is expected to be made by SNIa. In this work, we calculate
complete abu... | 2306.12885v1 |
2023-06-27 | Permanent magnet systems to study the interaction between magnetic nanoparticles and cells in microslide channels | We optimized designs of permanent magnet systems to study the effect of
magnetic nanoparticles on cell cultures in microslide channels. This produced
two designs, one of which is based on a large cylindrical magnet that applies a
uniform force density of 6 MN/m$^3$ on soft magnetic iron-oxide spherical
nanoparticles at... | 2306.15459v2 |
2023-07-10 | Design and processing as ultrathin films of a sublimable Iron(II) spin crossover material exhibiting efficient and fast light-induced spin transition | Materials based on spin crossover (SCO) molecules have centred the attention
in Molecular Magnetism for more than forty years as they provide unique
examples of multifunctional and stimuli-responsive materials, which can be then
integrated into electronic devices to exploit their molecular bistability. This
process oft... | 2307.04591v1 |
2023-07-17 | Controlling the Temperature of the Spin-Reorientation Transition In HoFe1-xMnxO3 Orthoferrite Single Crystals | HoFe1-xMnxO3 (0 < x < 1) single crystals have been grown by the optical
floating zone technique. A structural transition from the orthorhombic to
hexagonal modification has been established in the crystals in the
concentration range of 0.7-0.8, which has been confirmed by the X-ray
diffraction data. For a series of the... | 2307.08236v1 |
2023-07-19 | Origin of Life Molecules in the Atmosphere After Big Impacts on the Early Earth | The origin of life on Earth would benefit from a prebiotic atmosphere that
produced nitriles, like HCN, which enable ribonucleotide synthesis. However,
geochemical evidence suggests that Hadean air was relatively oxidizing with
negligible photochemical production of prebiotic molecules. These paradoxes are
resolved by ... | 2307.09761v1 |
2023-07-28 | Structural phase transition, $s_{\pm}$-wave pairing and magnetic stripe order in the bilayered nickelate superconductor La$_3$Ni$_2$O$_7$ under pressure | Motivated by the recently discovered high-$T_c$ superconductor
La$_3$Ni$_2$O$_7$, we comprehensively study this system using density
functional theory and random phase approximation calculations. At low
pressures, the Amam phase is stable, containing the Y$^{2-}$ mode distortion
from the Fmmm phase, while the Fmmm phas... | 2307.15276v4 |
2023-08-01 | The current state of disk wind observations in BHLMXBs through X-ray absorption lines in the iron band | The presence of blueshifted absorption lines in the X-ray spectra of Black
Hole Low Mass X-ray Binaries is the telltale of massive outflows called winds.
These signatures are found almost exclusively in soft states of high-inclined
systems, hinting at equatorial ejections originating from the accretion disk
and deeply ... | 2308.00691v1 |
2023-08-07 | Energy-resolved pulse profiles of accreting pulsars: Diagnostic tools for spectral features | We introduce a method for extracting spectral information from
energy-resolved light curves folded at the neutron star spin period (known as
pulse profiles) in accreting X-ray binaries. Spectra of these sources are
sometimes characterized by features superimposed on a smooth continuum, such as
iron emission lines and c... | 2308.03395v1 |
2023-08-08 | Designing optoelectronic properties by on-surface synthesis: formation and electronic structure of an iron-terpyridine macromolecular complex | Supramolecular chemistry protocols applied on surfaces offer compelling
avenues for atomic scale control over organic-inorganic interface structures.
In this approach, adsorbate-surface interactions and two-dimensional
confinement can lead to morphologies and properties that differ dramatically
from those achieved via ... | 2308.04105v1 |
2023-09-05 | Magnetic and structural properties of the iron silicide superconductor LaFeSiH | The magnetic and structural properties of the recently discovered
pnictogen/chalcogen-free superconductor LaFeSiH ($T_c\simeq10$~K) have been
investigated by $^{57}$Fe synchrotron M{\"o}ssbauer source (SMS) spectroscopy,
x-ray and neutron powder diffraction and $^{29}$Si nuclear magnetic resonance
spectroscopy (NMR). N... | 2309.02241v1 |
2023-09-15 | Superconductivity and vortex structure on Bi$_{2}$Te$_{3}$/FeTe$_{0.55}$Se$_{0.45}$ heterostructures with different thickness of Bi$_{2}$Te$_{3}$ films | Using scanning tunnel microscopy (STM), we investigate the superconductivity
and vortex properties in topological insulator Bi$_{2}$Te$_{3}$ thin films
grown on the iron-based superconductor FeTe$_{0.55}$Se$_{0.45}$. The
proximity-induced superconductivity weakens in the Bi$_{2}$Te$_{3}$ film when
the thickness of the ... | 2309.08246v1 |
2023-09-22 | Wavelet spectral timing: X-ray reverberation from a dynamic black hole corona hidden beneath ultrafast outflows | Spectral timing analyses based upon wavelet transforms provide a new means to
study the variability of the X-ray emission from accreting systems, including
AGN, stellar mass black holes and neutron stars, and can be used to trace the
time variability of X-ray reverberation from the inner accretion disc. The
previously-... | 2309.13107v2 |
2023-10-13 | Polarized microwave emission from space particles in the upper atmosphere of the Earth | Tons of space particles enter the Earth atmosphere every year, being detected
when they produce fireballs, meteor showers, or when they impact the Earth
surface. Particle detection in the showers could also be attempted from space
using satellites in low Earth orbit. Measuring the polarization would provide
extra cruci... | 2310.08941v1 |
2023-10-17 | Towards atomistic understanding of Iron phosphate glass: a first-principles based DFT modeling and study of its physical properties | Iron phosphate glasses (IPG) have been proposed as futuristic glass material
for nuclear waste immobilization, anode material for lithium batteries and also
as bioactive glass. In the last decade, there have been attempts to propose
atomistic models of IPG to explain their properties from atomistic viewpoint
and to pre... | 2310.11135v1 |
2023-10-25 | Post-main sequence thermal evolution of planetesimals | White dwarfs that have accreted planetary materials provide a powerful tool
to probe the interiors and formation of exoplanets. In particular, the high
Fe/Si ratio of some white dwarf pollutants suggests that they are fragments of
bodies that were heated enough to undergo large-scale melting and iron core
formation. In... | 2310.17057v1 |
2023-10-26 | Honing cross-correlation tools for inference on ultra-high-energy cosmic-ray composition | The chemical composition of the highest-energy cosmic rays, namely the atomic
number $Z$ of rays with energies $E\gg1~\text{EeV}$, remains to date largely
unknown. Some information on the composition can be inferred from the
deflections that charged ultra-high-energy cosmic rays experience while they
traverse interveni... | 2310.17699v2 |
2023-10-31 | Chemical evolution models: the role of type Ia supernovae in the $α$-elements over Iron relative abundances and their variations in time and space | The role of type Ia supernovae, mainly the Delay Time Distributions (DTDs)
determined by the binary systems, and the yields of elements created by
different explosion mechanisms, are studied by using the {\sc MulChem} chemical
evolution model, applied to our Galaxy. We explored 15 DTDs, and 12 tables of
elemental yield... | 2311.00076v1 |
2023-11-01 | Annealing effects on the magnetic and magnetotransport properties of iron oxide nanoparticles self-assemblies | In magnetic tunnel junctions based on iron oxide nanoparticles the disorder
and the oxidation state of the surface spin as well as the nanoparticles
functionalization play a crucial role in the magnetotransport properties. In
this work, we report a systematic study of the effects of vacuum annealing on
the structural, ... | 2311.00700v1 |
2023-11-10 | Enhancement of optical absorption in multiferroic (1-x)PZT-xPFN thin films: Experiments and first-principles analysis | Multiferroic compounds have gained research attention in the field of
ferroelectric photovoltaics due to the presence of transition-metal d states
from magnetic ions, which tend to reduce the bandgap value. In this work,
0.5Pb(Zr0.52Ti0.48)O3 - 0.5Pb(Fe0.5Nb0.5)O3 PZTFN0.5 thin films were
synthesized using a sol-gel ro... | 2311.05855v1 |
2023-11-14 | Superconductivity with $T_c$ up to 30.7 K in air-annealed CaFeAsF | Exploring new unconventional superconductors is of great value for both
fundamental research and practical applications. It is a long-term challenge to
develop and study more hole-doped superconductors in 1111 system of iron-based
superconductors. However, fifteen years after the discovery of iron-based
superconductors... | 2311.07943v1 |
2023-12-14 | X-ray Reflection from the Plunging Region of Black Hole Accretion Disks | Accretion around black holes is very often characterized by distinctive X-ray
reflection features (mostly, iron inner-shell transitions), which arise due to
the primary radiation being reprocessed by a dense and relatively colder
medium, such as an accretion disk. Most reflection modeling assume that
emission stops at ... | 2312.09210v1 |
2024-01-05 | Joint analysis of the iron emission in the optical and near-infrared spectrum of I Zw 1 | Constraining the physical conditions of the ionized media in the vicinity of
an active supermassive black hole (SMBH) is crucial to understanding how these
complex systems operate. Metal emission lines such as iron (Fe) are useful
probes to trace the gaseous media's abundance, activity, and evolution in these
accreting... | 2401.02936v1 |
2024-01-16 | Bias-Compensated State of Charge and State of Health Joint Estimation for Lithium Iron Phosphate Batteries | Accurate estimation of the state of charge (SOC) and state of health (SOH) is
crucial for the safe and reliable operation of batteries. Voltage measurement
bias highly affects state estimation accuracy, especially in Lithium Iron
Phosphate (LFP) batteries, which are susceptible due to their flat open-circuit
voltage (O... | 2401.08136v2 |
2024-01-19 | Reflecting on naked singularities: iron line fitting as a probe of the cosmic censorship conjecture | We demonstrate that the X-ray iron line fitting technique can be leveraged as
a powerful probe of the cosmic censorship conjecture. We do this by extending
existing emission line models to arbitrary spin parameters of the Kerr metric,
no longer restricted to black hole metrics with $|a_\bullet |< 1$. We show that
the e... | 2401.10565v1 |
2024-01-25 | Nucleosynthesis in magnetorotational supernovae: impact of the magnetic field configuration | The production of heavy elements is one of the main by-products of the
explosive end of massive stars. A long sought goal is finding differentiated
patterns in the nucleosynthesis yields, which could permit identifying a number
of properties of the explosive core. Among them, the traces of the magnetic
field topology a... | 2401.14402v1 |
2024-02-15 | A variable ionized disk wind in MAXI J1803-298 revealed by NICER | We present the results from the NICER observation data of MAXI J1803-298
across the entire 2021 outburst. In the intermediate and soft state, we detect
significant absorption lines at $\sim 7.0$ keV and $\sim 6.7$ keV, arising from
the X-ray disk wind outflowing with a velocity of hundreds of km per second
along our li... | 2402.10315v1 |
2024-03-04 | Interplay between alloying and tramp element effects on temper embrittlement in bcc iron: DFT and thermodynamic insights | The details of the temper embrittlement mechanism in steels caused by
impurities are unknown. Especially from an atomistic point of view, there are
still open questions regarding their interactions with alloying elements such
as Ni, Cr, and Mo. Therefore, we used density functional theory to investigate
the segregation... | 2403.02186v1 |
2024-03-10 | Conventional Superconductivity in the Doped Kagome Superconductor Cs(V0.86Ta0.14)3Sb5 from Vortex Lattice Studies | A hallmark of unconventional superconductors is their complex electronic
phase diagrams where "intertwined orders" of charge-spin-lattice degrees of
freedom compete and coexist as in copper oxides and iron pnictides. While the
electronic phase diagram of kagome lattice superconductor such as CsV3Sb5 also
exhibits compl... | 2403.06046v1 |
2024-03-14 | An FFT based approach to account for elastic interactions in OkMC: Application to dislocation loops in iron | Object kinetic Montecarlo (OkMC) is a fundamental tool for modeling defect
evolution in volumes and times far beyond atomistic models. The elastic
interaction between defects is classically considered using a dipolar
approximation but this approach is limited to simple cases and can be
inaccurate for large and close in... | 2403.09158v1 |
2024-03-18 | Primary Defect Production in Doped Iron Grain Boundaries during Low Energy Collision Cascades | This study explores the intricate interactions between grain boundaries (GBs)
and irradiation-induced defects in nanocrystalline iron, highlighting the role
of dopants like copper. Utilizing molecular dynamics simulations, the research
delineates how GB properties, such as GB energy and defect formation energies,
influ... | 2403.12257v1 |
2022-04-02 | Direct Measurement of the Nickel Spectrum in Cosmic Rays in the Energy Range from 8.8 GeV/n to 240 GeV/n with CALET on the International Space Station | The relative abundance of cosmic ray nickel nuclei with respect to iron is by
far larger than for all other trans-iron elements, therefore it provides a
favorable opportunity for a low background measurement of its spectrum. Since
nickel, as well as iron, is one of the most stable nuclei, the nickel energy
spectrum and... | 2204.00845v1 |
2020-12-03 | On the Use of Field RR Lyrae as Galactic Probes. II. A new $Δ$S calibration to estimate their metallicity | We performed the largest and most homogeneous spectroscopic survey of field
RR Lyraes (RRLs). We secured $\approx$6,300 high resolution (HR, R$\sim$35,000)
spectra for 143 RRLs (111 fundamental, RRab; 32 first overtone, RRc). The
atmospheric parameters were estimated by using the traditional approach and the
iron abund... | 2012.02284v1 |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.