publicationDate stringlengths 1 2.79k | title stringlengths 1 36.5k ⌀ | abstract stringlengths 1 37.3k ⌀ | id stringlengths 9 47 |
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2019-11-18 | ONETEP + TOSCAM: uniting dynamical mean field theory and linear-scaling density functional theory | We introduce the unification of dynamical mean field theory (DMFT) and
linear-scaling density functional theory (DFT), as recently implemented in
ONETEP, a linear-scaling DFT package, and TOSCAM, a DMFT toolbox. This code can
account for strongly correlated electronic behavior while simultaneously
including the effects... | 1911.07752v2 |
2019-11-21 | First discovery of trans-iron elements in a DAO-type white dwarf (BD$-22{^\circ}3467$) | We have identified 484 lines of the trans-iron elements (TIEs) Zn, Ga, Ge,
Se, Br, Kr, Sr, Zr, Mo, In, Te, I, Xe, and Ba, for the first time in the
ultraviolet spectrum of a DAO-type WD, namely BD$-22{^\circ}3467$, surrounded
by the ionized nebula Abell 35. Our TIE abundance determination shows extremely
high overabund... | 1911.09573v1 |
2019-11-25 | Local metallicity distribution function derived from Galactic large-scale radial iron pattern modelling | We develop an approach for fitting the results of modeling of wriggling
radial large scale iron pattern along the Galactic disk, derived over young
(high massive) Cepheids, with the metallicity distribution, obtained using low
mass long living dwarf stars in the close solar vicinity. For this, at the step
of computing ... | 1911.10842v1 |
2019-12-09 | Pulsation in faint blue stars | Following the discovery of blue large-amplitude pulsators (BLAPs) by the OGLE
survey, additional hot, high-amplitude pulsating stars have been discovered by
the Zwicky Transient Facility. It has been proposed that all of these objects
are low-mass pre-white dwarfs and that their pulsations are driven by the
opacity of ... | 1912.04129v1 |
2019-12-18 | Giant enhancement of critical current density at high field in superconducting (Li,Fe)OHFeSe films by Mn doping | Critical current density (Jc) is one of the major limiting factors for high
field applications of iron-based superconductors. Here, we report that Mn-ions
are successfully incorporated into nontoxic superconducting (Li,Fe)OHFeSe
films. Remarkably, the Jc is significantly enhanced from 0.03 to 0.32 MA/cm^2
under 33 T, a... | 1912.08414v1 |
2019-12-19 | The influence of hydrogen on plasticity in pure iron-theory and experiment | Tensile stress relaxation is combined with transmission electron microscopy
to reveal dramatic changes in dislocation structure and sub structure in pure
alpha iron as a result of the effects of dissolved hydrogen. We find that
hydrogen charged specimens after plastic deformation display a very
characteristic pattern o... | 1912.09313v1 |
2019-12-22 | Effects of momentum-dependent quasiparticle renormalization on the gap structure of iron-based superconductors | We discuss the influence of momentum-dependent correlations on the
superconducting gap structure in iron-based superconductors. Within the weak
coupling approach including self-energy effects at the one-loop
spin-fluctuation level, we construct a dimensionless pairing strength
functional which includes the effects of q... | 1912.10453v3 |
2019-12-23 | Measuring transferability issues in machine-learning force fields: The example of Gold-Iron interactions with linearized potentials | Machine-learning force fields have been increasingly employed in order to
extend the possibility of current first-principles calculations. However, the
transferability of the obtained potential can not always be guaranteed in
situations that are outside the original database. To study such limitation, we
examined the v... | 1912.10761v3 |
2020-01-08 | Nucleosynthesis in early rotating massive stars and chemical composition of CEMP stars | The first massive stars triggered the onset of chemical evolution by
releasing the first metals (elements heavier than helium) in the Universe. The
nature of these stars and how the early chemical enrichment took place is still
largely unknown. Rotational-induced mixing in the stellar interior can impact
the nucleosynt... | 2001.02341v1 |
2020-01-17 | Dissociated dislocation-mediated carbon transport and diffusion in austenitic iron | Dislocation-solute interaction plays fundamental roles in mechanical
properties of alloys. Here, we disclose the essential features of
dislocation-carbon interaction in austenitic Fe at the atomistic scale. We show
that passage of a Shockley partial dislocation in face-centered cubic iron is
able to move carbon atoms o... | 2001.06196v1 |
2020-01-23 | Testing general relativity with the stellar-mass black hole in LMC X-1 using the continuum-fitting method | The iron line and the continuum-fitting methods are currently the two leading
techniques for measuring black hole spins with electromagnetic radiation. They
can be naturally extended for probing the spacetime geometry around black holes
and testing general relativity in the strong field regime. In the past couple
of ye... | 2001.08391v2 |
2020-01-24 | Passivation mechanisms and pre-oxidation effects on model surfaces of FeCrNi austenitic stainless steel | Passivation mechanisms were investigated on (100)-oriented Fe-18Cr-13Ni
surfaces with direct transfer between surface preparation and analysis by X-ray
photoelectron spectroscopy and scanning tunneling microscopy and
electrochemical characterization. Starting from oxide-free surfaces,
pre-oxidation at saturation under ... | 2001.09025v1 |
2020-02-04 | Magnetically controlled vector based on E coli Nissle 1917 | In this paper, it is first discovered that EcN has natural magnetically
controlled properties, that is, E coli Nissle 1917 cells move in a gradient
magnetic field of permanent magnets without artificial magnetic labeling. It is
also shown in the paper that the cultivation of EcN in a medium enriched with
iron chelates ... | 2002.01958v1 |
2020-02-10 | Structural and magneto-transport studies of iron intercalated Bi2Se3 single crystals | A detailed investigation on the structural and magneto-transport properties
of iron intercalated Bi2Se3 single crystals have been presented. The x-ray
diffraction and Raman studies confirm the intercalation of Fe in the van der
Waals gaps between the layers. The electrical resistivity of the compounds
decreases upon in... | 2002.03609v2 |
2020-02-24 | Local Structure of Mott Insulating Iron Oxychalcogenides La$_{2}$O$_{2}$Fe$_{2}$O$M$$_{2}$ ($M$ = S, Se) | We describe the local structural properties of the iron oxychalcogenides,
La$_2$O$_2$Fe$_2$O$M_2$ ($M$ = S, Se), by using pair distribution function
(PDF) analysis applied to total scattering data. Our results of neutron powder
diffraction show that $M$ = S and Se possess similar nuclear structure at low
and room tempe... | 2002.10305v2 |
2020-03-06 | Adsorption property of fatty acid on iron surface with $Σ$3(111) grain boundary | Reducing the coefficient of boundary friction on steel surfaces is one of key
technologies to improve the efficiency of machines such as automotive engines.
It has been shown that the boundary friction on nanostructured steel surfaces
in the sliding test using hydrocarbon lubricant molecules is smaller than the
frictio... | 2003.03061v1 |
2020-03-12 | Band Engineering of Dirac cones in Iron Chalcogenides | By band engineering the iron chalcogenide Fe(Se,Te) via ab-initio
calculations, we search for topological surface states and realizations of
Majorana bound states. Proposed topological states are expected to occur for
non-stoichiometric compositions on a surface Dirac cone where issues like
disorder scattering and char... | 2003.05732v2 |
2020-03-24 | Momentum dependent $d_{xz/yz}$ band splitting in LaFeAsO | We performed angle-resolved photoemission spectroscopy (ARPES) studies of the
electronic structure of the nematic phase in LaFeAsO. Degeneracy breaking
between the dxz and dyz hole bands near the {\Gamma} and M point is observed in
the nematic phase. Different temperature dependent band splitting behaviors are
observed... | 2003.10618v1 |
2020-03-26 | Quasiclassical theory of $C_4$-symmetric magnetic order in disordered multiband metals | Recent experimental studies performed in the normal state of iron-based
superconductors have discovered the existence of the $C_4$-symmetric
(tetragonal) itinerant magnetic state. This state can be described as a spin
density wave with two distinct magnetic vectors ${\vec Q}_1$ and ${\vec Q}_2$.
Given an itinerant natu... | 2003.12124v1 |
2020-03-30 | Electronic correlation effects and local magnetic moments in L1$_0$ phase of FeNi | We study the electronic and magnetic properties of L1$_0$ phase of FeNi, a
perspective rare-earth-free permanent magnet, by using a combination of density
functional and dynamical mean-field theory. Although L1$_0$ FeNi has a slightly
tetragonally distorted fcc lattice, we find that magnetic properties of its
constitue... | 2003.13347v2 |
2020-03-03 | Novel Meta-Heuristic Model for Discrimination between Iron Deficiency Anemia and B-Thalassemia with CBC Indices Based on Dynamic Harmony Search | In recent decades, attention has been directed at anemia classification for
various medical purposes, such as thalassemia screening and predicting iron
deficiency anemia (IDA). In this study, a new method has been successfully
tested for discrimination between IDA and \b{eta}-thalassemia trait
(\b{eta}-TT). The method ... | 2004.00480v1 |
2020-04-03 | Spin-Excitations Anisotropy in the Bilayer Iron-Based Superconductor CaKFe$_4$As$_4$ | We use polarized inelastic neutron scattering to study the spin-excitations
anisotropy in the bilayer iron-based superconductor CaKFe$_4$As$_4$ ($T_c$ = 35
K). In the superconducting state, both odd and even $L-$modulations of spin
resonance have been observed in our previous unpolarized neutron scattering
experiments ... | 2004.01405v1 |
2020-04-13 | Topological magnetic line defects in Fe(Te,Se) high-temperature superconductors | Magnetic impurity chains on top of conventional superconductors are promising
platforms to realize Majorana modes. Iron-based high-temperature
superconductors are known in the vicinity of magnetic states due to the strong
Hund's coupling in iron atoms. Here we propose that the line defects with
missing Te/Se anions in ... | 2004.05848v1 |
2020-04-27 | Permanent Magnet Penning Trap | The Penning trap has been investigated as the basis of a small nuclear fusion
reactor using a superconducting solenoid magnet. To extend this investigation,
we designed, constructed, and evaluated a permanent magnet Penning trap. The
device consists of a solenoid formed from an annular array of neodymium bar
magnets be... | 2004.13103v1 |
2020-05-13 | Importance of Fermi surface and magnetic interactions for the superconducting dome in electron doped FeSe intercalates | The van-der-Waals gap of iron chalcogenide superconductors can be
intercalated with a variety of inorganic and organic compounds that modify the
electron doping level of the iron layers. In Lix(C3N2H10)0.37FeSe, a dome in
the superconducting transition temperature Tc has been reported to occur in the
doping range of x=... | 2005.06215v1 |
2020-06-07 | Kinetics of segregation formation in elastic field of edge dislocation in bcc iron | We study the kinetics of the redistribution of impurity atoms in the elastic
fields of dislocations by computer simulation methods. A work consists of
several stages. The first is the simulation of a dislocation core structure
with a Burgers vector along [100] direction by using the modified molecular
static method. Th... | 2006.04036v1 |
2020-06-10 | Quantum-Critical Spin-Density Waves in Iron-Selenide High-Tc Superconductors | Hidden spin-density waves (hSDW) with Neel ordering vector (pi,pi) have been
proposed recently as parent groundstates to electron-doped iron-selenide
superconductors. Doping such groundstates can result in visible electron-type
Fermi surface pockets and faint hole-type Fermi surface pockets at the corner
of the folded ... | 2006.05680v1 |
2020-06-11 | Low thermal conductivity of iron-silicon alloys at Earth core conditions with implications for the geodynamo | Earth core is composed of iron (Fe) alloyed with light elements, e.g.,
silicon (Si). Its thermal conductivity critically affects Earth thermal
structure, evolution, and dynamics, as it controls the magnitude of thermal and
compositional sources required to sustain a geodynamo over Earth history. Here
we directly measur... | 2006.06271v2 |
2020-06-11 | Double single-channel Kondo coupling in graphene with Fe molecules | We study the interaction between graphene and a single-molecule-magnet,
[Fe4(L)2(dpm)6]. Focusing on the closest Iron ion in a hollow position with
respect to the graphene sheet, we derive a channel selective tunneling
Hamiltonian, that couples different d orbitals of the Iron atom to precise
independent combinations o... | 2006.06723v1 |
2020-06-24 | Iron line reverberation mapping in Ghasemi-Nodehi-Bambi background | The reverberation associated with the iron line is the time lag between
direct photons from the corona and the photons reflected from the disk. The
resulting line spectrum is called the 2D transfer function. The shape of the 2D
transfer function is determined by the geometry of spacetime and the properties
of BH. In a ... | 2006.13640v1 |
2020-07-13 | Effect of interactions and non-uniform magnetic states on the magnetization reversal of iron nanowire arrays | Ordered ferromagnetic nanowire arrays are widely studied due to the diversity
of possible applications. However, there is still no complete understanding of
the relation between the array's parameters and its magnetic behavior. The
effect of vortex states on the magnetization reversal of large-diameter
nanowires is of ... | 2007.06499v1 |
2020-07-19 | Isostructural spin-density-wave and superconducting gap anisotropies in iron-arsenide superconductors | When passing through a phase transition, electronic system saves energy by
opening energy gaps at the Fermi level. Delineating the energy gap anisotropy
provides insights into the origin of the interactions that drive the phase
transition. Here, we report the angle-resolved photoemission spectroscopy
(ARPES) study on t... | 2007.09572v1 |
2020-07-15 | Structure and Properties of Thermoresponsive Diblock Copolymers Embedded with Metal Oxide Nanoparticles | Nanostructured polymer-metal oxide composites are a current research area of
great importance due to its highlight applications in sensors, optics,
catalysts and drug delivery. Particularly the use of thermoresponsive polymers
gives more flexibilities and possibilities in the design and construction of
polymer template... | 2007.10111v1 |
2020-08-09 | The Iron Line Profile from Warped Black Hole Accretion Disks | The profile of the fluorescent iron line from black hole accretion disks is a
powerful diagnostic of black hole properties, such as spin and inclination. The
state-of-the-art, however, considers an accretion disk whose angular momentum
is aligned with that of the black hole; this is a very constraining assumption
which... | 2008.03829v2 |
2020-08-13 | Detection of a possible multiphase ultra-fast outflow in IRAS 13349+2438 with NuSTAR and XMM-Newton | We present joint NuSTAR and XMM-Newton observations of the bright, variable
quasar IRAS 13349+2438. This combined dataset shows two clear iron absorption
lines at 8 and 9 keV, which are most likely associated with two layers of
mildly relativistic blueshifted absorption, with velocities of 0.14c and 0.27c.
We also find... | 2008.05965v1 |
2020-08-18 | Thickness-dependent electron momentum relaxation times in iron films | Terahertz time-domain conductivity measurements in 2 to 100 nm thick iron
films resolve the femtosecond time delay between applied electric fields and
resulting currents. This current response time decreases from 29 fs for
thickest films to 7 fs for the thinnest films. The macroscopic response time is
not strictly prop... | 2008.07852v1 |
2020-09-14 | BaCuS2: a superconductor with moderate electron-electron correlation | We show that the layered-structure BaCuS$_2$ is a moderately correlated
electron system in which the electronic structure of the CuS layer bears a
resemblance to those in both cuprates and iron-based superconductors.
Theoretical calculations reveal that the in-plane $d$-$p$ $\sigma^*$-bonding
bands are isolated near th... | 2009.06230v1 |
2020-09-29 | On the possibility of through passage of asteroid bodies across the Earth's atmosphere | We have studied the conditions of through passage of asteroids with diameters
200, 100 and 50 m, consisting of three types of materials -- iron, stone and
water ice across the Earth's atmosphere with the minimum trajectory altitude
10--15 km. The conditions of this passage with subsequent exit into outer space
with the... | 2009.14234v1 |
2020-10-02 | Effect of the surface shape of a large space body on its fragmentation in a planetary atmosphere | Employing the finite element and computational fluid dynamics methods, we
have determined the conditions for the fragmentation of space bodies or
preservation of their integrity when they penetrate into the Earth's
atmosphere. The origin of forces contributing to the fragmentation of space
iron bodies during the passag... | 2010.01095v1 |
2020-10-09 | Pressure-induced magnetism in iron-based superconductors $A$Fe$_2$As$_2$ ($A=$ K, Cs, Rb) | The magnetic properties of iron-based superconductors $A$Fe$_2$As$_2$ ($A=$K,
Cs, and Rb), which are characterized by the V-shaped dependence of the critical
temperature ($T_{\rm c}$) on pressure ($P$) were studied by means of the muon
spin rotation/relaxation technique. In all three systems studied the magnetism
was f... | 2010.04448v1 |
2020-11-24 | Short-range nematic fluctuations in Sr1-xNaxFe2As2 superconductors | Interactions between nematic fluctuations, magnetic order and
superconductivity are central to the physics of iron-based superconductors.
Here we report on in-plane transverse acoustic phonons in hole-doped
Sr$_{1-x}$Na$_x$Fe$_2$As$_2$ measured via inelastic X-ray scattering, and
extract both the nematic susceptibility... | 2011.12444v1 |
2020-12-07 | Magnetic anisotropy from linear defect structures in correlated electron systems | Correlated electron systems, particularly iron-based superconductors, are
extremely sensitive to strain, which inevitably occurs in the crystal growth
process. Built-in strain of this type has been proposed as a possible
explanation for experiments where nematic order has been observed at high
temperatures correspondin... | 2012.03824v2 |
2020-12-08 | Mean field theory and Monte Carlo simulation of Phase transitions and Magnetic Properties of a tridimensional Fe7S8 Compound | The structural, electronic and magnetic properties of Fe7S8 material have
been studied within the framework of the ab-initio calculations, the mean field
approximation (MFA) and Monte Carlo simulation (MCS). Our study shows that two
forms of the iron atoms, Fe2+ with spin S=2, and Fe3+ with spin {\sigma}=5/2
are the mo... | 2012.04306v1 |
2020-12-13 | Under an Iron Sky: On the Entropy at the Start of the Universe | Curiously, our Universe was born in a low entropy state, with abundant free
energy to power stars and life. The form that this free energy takes is usually
thought to be gravitational: the Universe is almost perfectly smooth, and so
can produce sources of energy as matter collapses under gravity. It has
recently been a... | 2012.06975v2 |
2020-12-24 | Intrinsic Time-reversal-invariant Topological Superconductivity in Thin Films of Iron-based Superconductors | We establish quasi-two-dimensional thin films of iron-based superconductors
(FeSCs) as a new high-temperature platform for hosting intrinsic
time-reversal-invariant helical topological superconductivity (TSC). Based on
the combination of Dirac surface state and bulk extended $s$-wave pairing, our
theory should be direc... | 2012.13411v2 |
2021-01-14 | Thermal response of the iron-based Ba122 superconductor to in situ and ex situ processes | The thermal properties are one of the key parameters to control phase purity
and microstructure of polycrystalline materials. The melting point of the
iron-based BaFe2As2 superconductor (Ba122), which foresees high-field
applications, remains controversial. In this work,
thermogravimetry-differential scanning calorimet... | 2101.05502v1 |
2021-01-19 | Role of interface morphology on the martensitic transformation in pure Fe | Using classical molecular dynamics simulations, we study austenite to ferrite
phase transformation in iron, focusing on the role of interface morphology. We
compare two different morphologies; a \textit{flat} interface in which the two
phases are joined according to Nishiyama-Wasserman orientation relationship vs.
a \t... | 2101.07468v1 |
2021-02-19 | Superconducting FeSe monolayer with milli-electron volt Fermi energy | Iron selenide (FeSe) is an iron-based superconductor which shows unique
properties, including strongly anisotropic superconducting gap, paramagnetism
in undoped compound and extremely small Fermi pocket size. In this work, we
demonstrate that the sizes of electron and hole pockets in FeSe monolayer
become much smaller ... | 2102.09792v1 |
2021-02-19 | Revealing the intrinsic superconducting gap anisotropy in surface-neutralized BaFe$_2$(As$_{0.7}$P$_{0.3}$)$_2$ | Alkaline-earth iron arsenide (122) is one of the most studied families of
iron-based superconductors, especially for angle-resolved photoemission
spectroscopy. While extensive photoemission results have been obtained, the
surface complexity of 122 caused by its charge-non-neutral surface is rarely
considered. Here, we ... | 2102.09919v1 |
2021-02-22 | Influence of the Fermi surface geometry on a Josephson effect between an iron-pnictide and conventional superconductors | We study Josephson junctions between a multi-band iron-pnictide
Ba1-xNaxFe2As2 and conventional s-wave superconductors Nb and Cu/Nb bilayer. We
observe that junctions with a Cu interlayer exhibit much larger IcRn, despite a
weaker proximity-induced superconductivity. This counterintuitive result is
attributed to the di... | 2102.10972v1 |
2021-02-24 | Intermediate mass and heavy Galactic cosmic-ray nuclei: the case of new AMS-02 measurements | The recent measurement of the spectra of intermediate mass nuclei and iron
nuclei carried out with the AMS-02 experiment provided us with the most
complete set of data on cosmic ray fluxes to date, and allowed us to test the
standard model for the transport of these particles through the Galaxy to the
finest details. W... | 2102.12576v2 |
2021-03-06 | Autonomous detection of molecular configurations in microscopic images based on deep convolutional neural network | In an effort to explore high-throughput processing of microscopic image data,
a method based on deep convolutional neural network is proposed. The
state-of-the-art computer vision algorithm, Faster R-CNN, was trained for the
detection of iron (II) phthalocyanines on Se-terminated Au(111) platform
resolved by scanning p... | 2103.04213v1 |
2021-03-11 | Stimuli-responsive assembly of iron oxide nanoparticles into magnetic flexible filaments | The combination of multiple functionalities in a single material is an
appealing strategy for the de-velopment of smart materials with unique
features. In this work, we present the preparation of thermoresponsive magnetic
nanoparticles and their one-dimensional assembly into transient
micro-filaments. The material is b... | 2103.06837v1 |
2021-03-24 | Proximity Effect of Epitaxial Iron Phthalocyanine Molecules on High-Quality Graphene Devices | Depositing magnetic insulators on graphene has been a promising route to
introduce magnetism via exchange proximity interaction in graphene for future
spintronics applications. Molecule-based magnets may offer unique opportunities
because of their synthesis versatility. Here, we investigated the magnetic
proximity effe... | 2103.12974v1 |
2021-03-29 | Fluorescence intensity correlation imaging with high resolution and elemental contrast using intense x-ray pulses | We theoretically investigate the fluorescence intensity correlation (FIC) of
Ar clusters and Mo-doped iron oxide nanoparticles subjected to intense,
femtosecond and sub-femtosecond XFEL pulses for high-resolution and elemental
contrast imaging. We present the FIC of {\Ka} and {\Kah} emission in Ar
clusters and discuss ... | 2103.15872v1 |
2021-03-31 | Slip band interactions and GND latent hardening in a galling resistant stainless steel | Slip activation, slip band interactions, and GND densities in iron-base,
galling resistant alloy Nitronic 60 have been characterised at the grain length
scale using small-scale mechanical testing with high resolution digital image
correlation and high-angular resolution electron backscatter diffraction. By
correlating ... | 2103.16864v1 |
2021-01-21 | Time-Dependent Density Functional Theory Applied to Average Atom Opacity | We focus on studying the opacity of iron, chromium, and nickel plasmas at
conditions relevant to experiments carried out at Sandia National Laboratories
[J. E. Bailey et al., Nature 517, 56 (2015)]. We calculate the photo-absorption
cross-sections and subsequent opacity for plasmas using linear response
time-dependent ... | 2104.00551v1 |
2021-04-15 | Unconventional iron-magnesium compounds at terapascal pressures | Being a lithophile element at ambient pressure, magnesium is long believed to
be immiscible with iron. A recent study by Gao et al. [1] showed that pressure
turns magnesium into a siderophile element and can produce unconventional Fe-Mg
compounds. Here, we extend the investigation to exoplanetary pressure
conditions us... | 2104.07700v1 |
2021-04-19 | Infrared phonon spectroscopy on the Cairo pentagonal antiferromagnet Bi2Fe4O9: a study through the pressure induced structural transition | Magnetic and crystallographic transitions in the Cairo pentagonal magnet
Bi2Fe4O9 are investigated by means of infrared synchrotron-based spectroscopy
as a function of temperature (20 - 300 K) and pressure (0 - 15.5 GPa). One of
the phonon modes is shown to exhibit an anomalous softening as a function of
temperature in... | 2104.09384v1 |
2021-04-21 | The effect of core formation on surface composition and planetary habitability | The melt productivity of a differentiated planet's mantle is primarily
controlled by its iron content, which is itself approximated by the planet's
core mass fraction (CMF). Here we show that estimates of an exo-planet's CMF
allows robust predictions of the thickness, composition and mineralogy of the
derivative crust.... | 2104.10612v1 |
2021-04-22 | Hund's metal crossover and superconductivity in the 111 family of iron-based superconductors | We study LiFeP, LiFeAs and NaFeAs in their paramagnetic metallic phase
including dynamical electronic correlations within a density functional theory
+ slave-spin mean-field framework. The three compounds are found to lie next to
the crossover between a normal and a Hund's metal, where a region of enhanced
electronic c... | 2104.11018v1 |
2021-05-03 | A Bayesian Method for Estimating Uncertainty in Excavated Material | This paper proposes a method to probabilistically quantify the moments (mean
and variance) of excavated material during excavation by aggregating the prior
moments of the grade blocks around the given bucket dig location. By modelling
the moments as random probability density functions (pdf) at sampled locations,
a for... | 2105.00600v1 |
2021-05-19 | Thermal conductivity of iron and nickel during melting: Implication to Planetary liquid outer core | We report the measurements of the thermal conductivity ($\kappa$) of iron
(Fe) and nickel (Ni) at high pressures and high temperatures. $\kappa$ values
are estimated from the temperature measurements across the sample surface in a
laser heated diamond anvil cell (LHDAC) and using the COMSOL software.
Near-isothermal $\... | 2105.08962v1 |
2021-05-19 | Origin of insulating ferromagnetism in iron oxychalcogenide Ce$_2$O$_2$FeSe$_2$ | An insulating ferromagnetic (FM) phase exists in the quasi-one-dimensional
iron chalcogenide Ce$_2$O$_2$FeSe$_2$ but its origin is unknown. To understand
the FM mechanism, here a systematic investigation of this material is provided,
analyzing the competition between ferromagnetic and antiferromagnetic
tendencies and t... | 2105.09239v2 |
2021-05-24 | Unveiling non-Abelian statistics of vortex Majorana bound states in iron-based superconductors using fermionic modes | Motivated by the recent experiments that reported the discovery of vortex
Majorana bound states (vMBSs) in iron-based superconductors, we establish a
portable scheme to unveil the non-Abelian statistics of vMBSs using normal
fermionic modes. The unique non-Abelian statistics of vMBSs is characterized by
the charge flip... | 2105.11199v1 |
2021-05-24 | Redox hysteresis of super-Earth exoplanets from magma ocean circulation | Internal redox reactions may irreversibly alter the mantle composition and
volatile inventory of terrestrial and super-Earth exoplanets and affect the
prospects for atmospheric observations. The global efficacy of these
mechanisms, however, hinges on the transfer of reduced iron from the molten
silicate mantle to the m... | 2105.11208v1 |
2021-05-27 | Iron phthalocyanine on Au(111) is a "non-Landau" Fermi liquid | The paradigm of Landau's Fermi liquid theory has been challenged with the
finding of a strongly interacting Fermi liquid that cannot be adiabatically
connected to a non-interacting system. A spin-1 two-channel Kondo impurity with
anisotropy D has a quantum phase transition between two topologically different
Fermi liqu... | 2105.13248v2 |
2021-06-04 | Finite element stress analysis of a combined stacker-reclaimer machine: A design audit report | Design audit or design verification is an important step in engineering of
heavy mobile materials handling equipment. Usually, the costumers employ third
parties for audition of contractors engineering. Here a part of design audit of
a combined stacker-reclaimer machine is reported. This equipment is designed
and const... | 2106.02291v1 |
2021-06-16 | Random iron-nickel alloys: From first principles to dynamic spin fluctuation theory | We provide a systematic analysis of finite-temperature magnetic properties of
random alloys Fe$_x$Ni$_{1-x}$ with the face-centered-cubic structure over a
broad concentration range $x$. By means of the spin-polarized relativistic
Korringa-Kohn-Rostoker method we calculate the electronic structure of
disordered iron-nic... | 2106.08765v2 |
2021-06-22 | Quantum-confined charge transfer that enhances magnetic anisotropy in lanthanum M-type hexaferrites | Iron-based hexaferrites are critical-element-free permanent magnet components
of magnetic devices. Of particular interest is electron-doped M-type
hexaferrite i.e., LaFe$_{12}$O$_{19}$ (LaM) in which extra electrons introduced
by lanthanum substitution of barium/strontium play a key role in uplifting the
magnetocrystal... | 2106.11947v1 |
2021-07-02 | Breakdown of the Hund's Rule in CuFeAs | The ground-state properties of CuFeAs were investigated by applying density
functional theory calculations within generalized gradient approximation (GGA)
and GGA+U. We find that the bicollinear antiferromagnetic state with
antiparallel orbital magnetic moments on each iron which violates the Hund's
rule is favored by ... | 2107.01014v1 |
2021-07-06 | The role of orbital nesting in the superconductivity of Iron-based Superconductors | We analyze the magnetic excitations and the spin-mediated superconductivity
in iron-based superconductors within a low-energy model that operates in the
band basis but fully incorporates the orbital character of the spin
excitations. We show how the orbital selectivity, encoded in our low-energy
description, simplifies... | 2107.02825v2 |
2021-07-14 | Phase-manipulation-induced Majorana Mode and Braiding Realization in Iron-based Superconductor Fe(Te,Se) | Recent experiment reported the evidence of dispersing one-dimensional
Majorana mode trapped by the crystalline domain walls in
FeSe$_{0.45}$Te$_{0.55}$. Here, we perform the first-principles calculations to
show that iron atoms in the domain wall spontaneously form the ferromagnetic
order in line with orientation of th... | 2107.06558v3 |
2021-07-15 | Multipolar nematic state of nonmagnetic FeSe based on the DFT+$U$ | Clarifying the origin of nematic state in FeSe is one of urgent problems in
the field of iron-based superconductivity. Motivated by the discovery of a
nematic solution in the density-functional theory implemented by on-site
Coulomb interaction (DFT+$U$) [npj Quantum Mater. \textbf{5}, 50 (2020)], we
reexamine the $U$ d... | 2107.07244v3 |
2021-07-16 | Discovery and implications of hidden atomic-scale structure in a metallic meteorite | Iron and its alloys have made modern civilisation possible, with metallic
meteorites providing one of the human's earliest sources of usable iron as well
as providing a window into our solar system's billion-year history. Here
highest-resolution tools reveal the existence of a previously hidden FeNi
nanophase within th... | 2107.07909v1 |
2021-07-24 | Controllable Majorana vortex states in iron-based superconducting nanowires | There has been experimental evidence for the Majorana zero modes (MZMs) in
solid state systems, which are building blocks for potential topological
quantum computing. It is important to design devices, in which MZMs are easy to
manipulate and possess a broad topological non-trivial parameter space for
fusion and braidi... | 2107.11562v1 |
2021-08-07 | Strong Momentum-Dependent Electron-Magnon Renormalization of a Surface Resonance on Iron | The coupling of fermionic quasiparticles to magnons is essential for a wide
range of processes, from ultrafast magnetization dynamics in ferromagnets to
Cooper pairing in superconductors. Although magnon energies are generally much
larger than phonon energies, up to now their electronic band renormalization
effect in f... | 2108.03421v1 |
2021-08-13 | Discovery of mesoscopic nematicity wave in iron-based superconductors | Nematicity is ubiquitous in electronic phases of high transition temperature
superconductors, particularly in iron-based superconductors (IBSCs). Order
parameter that characterizes the nematic phase has been investigated in
momentum space, but its real-space arrangement remains largely unclear. We use
linear dichroism ... | 2108.06122v3 |
2021-08-17 | Importance of the many-body effects for structural properties of the novel iron oxide: Fe$_2$O | The importance of many-body effects on electronic and magnetic properties and
stability of different structural phases was studied in novel iron oxide -
Fe$_2$O. It was found that while Hubbard repulsion hardly affects the
electronic spectrum of this material ($m^*/m \sim 1.2$), but it strongly
changes its phase diagra... | 2108.07645v1 |
2021-08-26 | Magnetic design study of coil-dominated superconducting quadrupole magnets based on racetrack coils | Several coil structures have been used in accelerator superconducting
quadrupole magnets, and cos2{\theta} quadrupole magnets are the most mature in
theoretical research and engineering applications. However, the cos2{\theta}
quadrupole magnet has a complicated coil structure, especially at the end of
the coil, which m... | 2108.11643v1 |
2021-09-13 | Pseudospin-Triplet Pairing in Iron-Chalcogenide Superconductors | We study superconductivity of electron systems with both spin and
pseudospin-1/2 degrees of freedom. By solving linearized gap equations, we
derive a weak coupling criterion for the even-parity spin-singlet
pseudospin-triplet pairing. It can generally mix with the on-site s-wave
pairing since both of them belong to the... | 2109.06039v4 |
2021-09-15 | Exploring DFT$+U$ parameter space with a Bayesian calibration assisted by Markov chain Monte Carlo sampling | Density-functional theory is widely used to predict the physical properties
of materials. However, it usually fails for strongly correlated materials. A
popular solution is to use the Hubbard corrections to treat strongly correlated
electronic states. Unfortunately, the exact values of the Hubbard $U$ and $J$
parameter... | 2109.07617v1 |
2021-09-16 | Zero-energy Andreev bound states in iron-based superconductor Fe(Te,Se) | Majorana bound states have been predicted to exist in vortices of topological
superconductors (SC). A realization of the Fu-Kane model, based on a
three-dimensional topological insulator brought into proximity to an $s$-wave
SC, in iron-based SC Fe(Te,Se) has attracted strong interest after pronounced
zero-energy bias ... | 2109.08200v1 |
2021-09-29 | High-performance Ba1-xKxFe2As2 superconducting joints for persistent current operation | Superconducting joints are one of the key technologies to make Ba1-xKxFe2As2
(Ba-122) superconducting wires or tapes for high-field applications. Herein,
superconducting joints were fabricated by a simple cold-pressing method, and
the joint resistance of the iron-based superconducting joint was estimated for
the first ... | 2109.14300v1 |
2021-10-06 | A New Weakly Supervised Learning Approach for Real-time Iron Ore Feed Load Estimation | Iron ore feed load control is one of the most critical settings in a mineral
grinding process, directly impacting the quality of final products. The setting
of the feed load is mainly determined by the characteristics of the ore
pellets. However, the characterisation of ore is challenging to acquire in many
production ... | 2110.04063v1 |
2021-10-13 | Oxygen adsorption induced superconductivity in ultrathin FeTe film on SrTiO3(001) | The phenomenon of oxygen incorporation induced superconductivity in iron
telluride (Fe1+yTe, with antiferromagnetic (AFM) orders) is intriguing and
quite different from the case of FeSe. Until now, the microscopic origin of the
induced superconductivity and the role of oxygen are far from clear. Here, by
combining in-s... | 2110.06417v1 |
2021-10-20 | High-entropy ejecta plumes in Cassiopeia A from neutrino-driven convection | Recent multi-dimensional simulations suggest that high-entropy buoyant plumes
help massive stars to explode. Outwardly protruding iron-rich fingers in the
galactic supernova remnant Cassiopeia A are uniquely suggestive of this
picture. Detecting signatures of specific elements synthesized in the
high-entropy nuclear bu... | 2110.10384v1 |
2021-10-26 | Tunable discontinuous shear thickening in capillary flow of MR suspensions | Very concentrated suspensions of iron particles in water or ethylene glycol
can be obtained thanks to the use of superplasticizer molecules used in cement
industry. At high volume fractions, these suspensions show a discontinuous
shear thickening which was thoroughly characterized in rotational geometries.
We will show... | 2110.13759v1 |
2021-12-04 | Quantitative relationship between structural orthorhombicity, shear modulus and heat capacity anomaly of the nematic transition in iron-based superconductors | Electronic nematicity in iron pnictide materials has been extensively studied
by various experimental techniques, yet its heat capacity anomaly at the phase
transition has not been examined quantitatively. In this work we review the
thermodynamic description of nematicity in $Ba(Fe_{1-x}Co_{x})_{2}As_{2}$ using
the Lan... | 2112.02239v2 |
2021-12-23 | The Three-Dimensional Collapse of a Rapidly Rotating 16 $M_{\odot}$ Star | We report on the three-dimensional (3D) hydrodynamic evolution to iron
core-collapse of a rapidly rotating 16 $M_{\odot}$ star. For the first time, we
follow the 3D evolution of the angular momentum (AM) distribution in the iron
core and convective shell burning regions for the final 10 minutes up to and
including grav... | 2112.12800v1 |
2021-12-28 | Cluster structure of superconducting phase and the nature of peaks in the doping dependences of the London penetration depth in iron pnictides | The mechanism of formation of dome-like phase diagrams and the features of
magnetic field penetration in iron pnictides with hetero- and isovalent doping
are considered within the framework of the previously proposed model, which
assumes the local character of doping and the cluster structure of resulted
superconductin... | 2112.14167v2 |
2022-01-18 | The Wrought Iron Beauty of Poncelet Loci | We've built a web-based tool for the real-time interaction with loci of
Poncelet triangle families. Our initial goals were to facilitate exploratory
detection of geometric properties of such families. During frequent walks in my
neighborhood, it appeared to me Poncelet loci shared a palette of motifs with
those found i... | 2201.06960v1 |
2022-01-18 | In-situ alignment of anisotropic hard magnets of 3D printed magnets | Within this work, we demonstrate in-situ easy-axis alignment of
single-crystal magnetic particles inside a polymer matrix using fused filament
fabrication. Two different magnetic materials are investigated: (i) Strontium
hexaferrite inside a PA6 matrix, fill grade: 49 vol% and (ii) Samarium iron
nitride inside a PA12 m... | 2201.07111v1 |
2022-01-19 | Nodal multigap superconductivity in the anisotropic iron-based compound RbCa2Fe4As4F2 | The 12442 compounds are a recently discovered family of iron-based
superconductors, that share several features with the cuprates due to their
strongly anisotropic structure, but are so far poorly understood. Here, we
report on the gap structure and anisotropy of RbCa2(Fe1-xNix)4As4F2 single
crystals, investigated by a... | 2201.07593v1 |
2022-01-24 | Hund's coupling and electronic anisotropy in the spin-density wave state of iron pnictides | In the multiband systems, Hund's coupling ($J$) plays a significant role in
the spin and charge excitations. We study the dependence of electronic
anisotropy on $J$ in terms of Drude-weight along different directions as well
as the orbital order in the four-fold symmetry broken spin-density wave state
of iron pnictides... | 2201.09808v1 |
2022-01-24 | Low-energy physics for an iron phthalocyanine molecule on Au(111) | The system of an iron phthalocyanine molecule on the Au(111) surface, has
been studied recently due to its peculiar properties. In particular, several
surprising results of scanning tunneling spectroscopy changing the position of
the molecule and applying magnetic field can be explained by the {\it
non-Landau} Fermi li... | 2201.10010v2 |
2022-01-25 | Multiscale machine-learning interatomic potentials for ferromagnetic and liquid iron | We develop and compare four interatomic potentials for iron: a simple
machine-learned embedded atom method (EAM) potential, a potential with
machine-learned two- and three-body-dependent terms, a potential with
machine-learned EAM and three-body terms, and a Gaussian approximation
potential with the SOAP descriptor. Al... | 2201.10237v1 |
2022-01-31 | Mathematical analysis of a thermodynamically consistent reduced model for iron corrosion | We are interested in a reduced model for corrosion of iron, in which ferric
cations and electrons evolve in a fixed oxide layer subject to a
self-consistent electrostatic potential. Reactions at the boundaries are
modeled thanks to Butler-Volmer formulas, whereas the boundary conditions on
the electrostatic potential m... | 2201.13193v1 |
2022-05-10 | A Machine-Learned Spin-Lattice Potential for Dynamic Simulations of Defective Magnetic Iron | A machine-learned spin-lattice interatomic potential (MSLP) for magnetic iron
is developed and applied to mesoscopic scale defects. It is achieved by
augmenting a spin-lattice Hamiltonian with a neural network term trained to
descriptors representing a mix of local atomic configuration and magnetic
environments. It rep... | 2205.04732v1 |
2022-05-26 | Elastoresistivity of heavily hole doped 122 iron pnictides superconductors | Nematicity in the heavily hole-doped iron pnictide superconductors remains
controversial. Sizeable nematic fluctuations and even nematic orders far from a
magnetic instability were declared in RbFe$_2$As$_2$ and its sister compounds.
Here we report a systematic elastoresistance study of series of isovalent- and
electro... | 2205.13663v1 |
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