publicationDate stringlengths 10 10 | abstract stringlengths 0 37.3k | title stringlengths 1 5.74k | doi stringlengths 11 47 ⌀ |
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2009-04-01 | The bound-state solutions of the Dirac equation for the Manning-Rosen potential are presented approximately for arbitrary spin-orbit quantum number κ . The energy eigenvalues and corresponding two-component spinors of the two Dirac particles are obtained in the closed form by using the framework of the spin symmetry a... | Approximate Solutions of the Dirac Equation for the Manning-Rosen Potential Including the Spin-Orbit Coupling Term | null |
2009-03-01 | The mechanism of the spin-forbidden reaction Ti^+(^4F, 3d^24s^1) + C_2H_4→TiC_2H_2 ^+ (^2A_2) + H_2 on both doublet and quartet potential energy surfaces has been investigated at the B3LYP level of theory. Crossing points between the potential energy surfaces and the possible spin inversion process are discussed by mea... | Theoretical study of the mechanism for C-H bond activation in spin-forbidden reaction between Ti^+ and C_2H_4
| null |
2009-03-01 | A computational study on iodine, iodide and polyiodide is carried out using different density functional methods and basis sets. All electron basis sets with hybrid and generalized-gradient approximation (GGA) functionals overestimate the bond distance and underestimate the vibrational frequency and formation energy of... | Computational study of the ground state properties of iodine and polyiodide ions | null |
2009-02-01 | In this paper we demonstrate the possibility of dissipationless spin transport in the chiral d -density wave state, by the sole application of a uniform Zeeman field gradient. The occurrence of these spontaneous spin currents is attributed to the parity (℘) and time-reversal ( $\mathcal{T}$ ) violation induced by the $... | Berry Phase and Topological Spin Transport in the Chiral d-Density Wave State | null |
2009-01-01 | The combined effect of inversion symmetry and time-reversal symmetry (Kramers degeneracy) lead to spin degeneracy in semiconductors. Hence, if these two symmetries are present, all levels are at least two-fold degenerate, a familiar result from atomic physics. The proof for crystalline solids is straightforward. | Spin Splitting | null |
2009-01-01 | In this chapter, the predictions of Heisenberg model, which were physically justified in Chap. 5, will be investigated from the point of view of magnetic phenomena. Magnetic systems, where the permanent magnetic moments arise due to localized electrons, are described very realistically by this model. We begin with an i... | Heisenberg Model | null |
2009-01-01 | Until now the nucleus has been often considered as a point charge with infinite mass, when compared to the electron mass. The hyperfine structure in high resolution optical spectra and a variety of experiments that we shall mention at a later stage, point out that the nuclear charge is actually distributed over a finit... | Nuclear moments and hyperfine interactions | null |
2009-01-01 | Ultracold quantum gases are like man-made universes that allow us, as we will see, to study interesting quantum many-body phenomena in detail. Although it turns out that these quantum gases are extremely well suited for manipulation by experimentalists, there are some limitations. A typical trapped alkali gas consists ... | Atomic Physics | null |
2009-01-01 | Pauli Spin Matrices | null | |
2009-01-01 | All the known interactions that occur in nature can be reduced to four interactions between material particles. Listed in order of decreasing strength, these are: the strong (nuclear) interaction, electromagnetism, the weak (nuclear) interaction, and gravity. The interaction strength varies with distance between the fo... | The Discovery of the Weak Interaction | null |
2009-01-01 | For many years, the carcinogenicity of Cr(VI) and the antidiabetic effects of Cr(III) compounds were regarded as independent biological activities, but recent evidence suggests that both these types of activities arise from varying amounts of Cr(VI) and reactive intermediates, such as Cr(V) species, which can be formed... | Chromium in Cancer and Dietary Supplements | null |
2009-01-01 | There are a number of properties that are important for heterostructures. For example, there are new contributions to spin splitting and the dimensionality of excitons is effectively reduced in a nanostructure. Hence, even though the basic theories for bulk band structures have already been presented, it is useful to s... | Heterostructures: Further Topics | null |
2009-01-01 | The spin-transition (^1A_1↔^5T_2) behaviour of a new mononuclear iron(II) compound [Fe^II(L)_3][PF_6]_2[L = 2-[3-(2′-pyridyl)pyrazole-1-ylmethyl]pyridine] has been investigated by ^57Fe Mössbauer spectroscopy. Analysis of the Mössbauer spectra revealed low value of the quadrupole splitting of the high-spin state which ... | Spin-transition in nearly cubic site in [Fe^II(L)_3][PF_6]_2
| null |
2009-01-01 | The spin-transition (^1A_1↔^5T_2) behaviour of a new mononuclear iron(II) compound [Fe^II(L)_3][PF_6]_2[L = 2-[3-(2′-pyridyl)pyrazole-1-ylmethyl]pyridine] has been investigated by ^57Fe Mössbauer spectroscopy. Analysis of the Mössbauer spectra revealed low value of the quadrupole splitting of the high-spin state which ... | Spin-transition in nearly cubic site in [Fe^II(L)_3][PF_6]_2
| null |
2009-01-01 | Much of the physics of the k·p theory is displayed by considering a single isolated band. Such a band is relevant to the conduction band of many semiconductors and can even be applied to the valence band under certain conditions. We will illustrate using a number of derivations for a bulk crystal. | One-Band Model | null |
2009-01-01 | It is well known that the band structure of electronic materials can be dramatically changed by applying external fields [1]. The effects of the quan¬tizing magnetic field on the band structure of compound semiconductors are more striking and can be observed easily in experiments. Under magnetic quantization, the motio... | The Einstein Relation in Compound Semiconductors Under Magnetic Quantization | null |
2009-01-01 | This document is part of subvolume B6bβ‘Actinide Monochalcogenides’ of Volume 27 ‘Magnetic properties of non-metallic inorganic compounds based on transition elements’ of Landolt-Börnstein - Group III ‘Condensed Matter’. The volume presents magnetic and related properties of monochalcogenides based on actinides and the... | US: Optical Conductivity and Dielectric Function | null |
2008-12-01 | We suggest a spin filter scheme using T-stub nanometric crossjunctions patterned in two dimensional electron gases (2DEGs) in the presence of spin orbit interaction (SOI). We compare the effects of SOI arising from vertical confinement of charge carriers in the well, Rashba or α-SOI, with SOI generated by lateral confi... | Spin filtering through ballistic nanojunctions, the role of geometry and of spin orbit interaction | null |
2008-12-01 | The effect of Dzialoshinski-Moriya (DM) interaction on thermal entanglement of a mixed-spin chain in an external magnetic field is investigated. It is found that DM interaction may enhance quantum thermal entanglement to a maximal value even though the magnetic field plays a positive role in shrinking thermal entanglem... | Effect of Dzialoshinski-Moriya interaction on thermal entanglement of a mixed-spin chain | null |
2008-10-01 | We study the linear conductance in quantum dot with spin–orbit interaction coupled to Fermi liquid leads with a power-low density of states. The conductance at zero temperature is calculated as a function of the power exponent from the density of state ρ ( ω )∼| ω − E _ F |^ r at the Fermi energy E _ F and the differen... | Quantum Dot in the Pseudo-gap Sate with Spin–Orbit Interaction | null |
2008-10-01 | Resistivity as a function of the temperature and applied magnetic field was studied in PrCo_2B_2C intermetallic compound. The resistivity as a function of temperature at different magnetic fields shows a parabolic behavior at low temperatures which persists for magnetic fields up to 7.8 T. Magnetoresistance measurement... | Spin Fluctuations and Itinerant Magnetism in PrCo_2B_2C Compound | null |
2008-09-03 | We theoretically propose a double quantum dots (QDs) ring to filter the electron spin that works due to the Rashba spin–orbit interaction (RSOI) existing inside the QDs, the spin-dependent inter-dot tunneling coupling and the magnetic flux penetrating through the ring. By varying the RSOI-induced phase factor, the magn... | Double Rashba Quantum Dots Ring as a Spin Filter | null |
2008-09-01 | Based on the extended Blonder-Tinkham-Klapwijk (BTK) approach, we have investigated the coherent quantum transport in two-dimensional electron gas/superconductor (2DEG/SC) double tunneling junctions in the presence of the Rashba spin-orbit coupling (RSOC). It is found that all the reflection coefficients in BTK theory ... | Coherent quantum transport in two-dimensional electron gas/superconductor double junctions with Rashba spin-orbit coupling | null |
2008-09-01 | III–V semiconductors doped with magnetic ions have been attracting interest of many laboratories all over the world during more than thirty years. At the beginning the reason was the will to understand influence of omnipresent unintentional, as well as intentionally introduced, impurities of transition metals or rare e... | Mn and other magnetic impurities in GaN and other III–V semiconductors – perspective for spintronic applications | null |
2008-09-01 | High resolution synchrotron radiation X-ray powder diffraction was used to investigate the melting of the cooperative Jahn-Teller distortion (cJTd) in a perovskite of composition KCu_0.8Mg_0.2F_3. A first order phase transition relaxing the cJTd is observed at T ∼ 600 K. From the transition temperature, an estimation o... | Experimental estimation of the cooperative Jahn-Teller energy in orbitally ordered KCu_0.8Mg_0.2F_3 perovskite | null |
2008-07-01 | The potential energy surfaces for the reaction of bare niobium cation with ethane, as a prototype of the C–H and C–C bonds activation in alkanes by transition metal cations, have been investigated employing the Density Functional Theory in its B3LYP formulation. All the minima and key transition states have been examin... | Theoretical study of the gas-phase ethane C–H and C–C bonds activation by bare niobium cation | null |
2008-06-01 | External gravitational fields induce phase factors in the wave functions of particles. The phases are exact to first order in the background gravitational field, are manifestly covariant and gauge invariant and provide a useful tool for the study of spin–gravity coupling and of the optics of particles in gravitational ... | Spin–gravity coupling and gravity-induced quantum phases | null |
2008-05-01 | The spin-forbidden reaction ^1HNO(^1A′)+OH^−→^3NO^−(^3Σ^−)+H_2O has been extensively explored using various CASSCF active spaces with MP2 corrections in several basis sets. Natural bond orbital (NBO) analysis, together with the NBO energetic ( deletion ) analysis, indicates that the two isomers have nearly equal total ... | A theoretical study of the proton transfer process in the spin-forbidden reaction ^1HNO(^1A′) + OH^−→^3NO^−(^3Σ^−) + H_2O | null |
2008-05-01 | The dissociation energies of MH_4 (M = La, Hf–Hg) were computed using full optimized reaction space (FORS) multi-configuration self-consistent field (MCSCF) and second-order multi-reference Møller–Plesset perturbation methods with the SBKJC basis sets augmented by a set of polarization functions (SBKJC(f,p)). It was s... | Tetra-hydrides of the third-row transition elements: spin–orbit coupling effects on geometrical deformation in WH_4 and OsH_4
| null |
2008-05-01 | In this work, we analyse the positive parity of states of odd-mass nucleus within the framework of interacting boson-fermion model. The result of an IBFM-1 multilevel calculation with the 2d_5/2, 1g_7/2, 3s_1/2, 2d_3/2 and 1h_11/2, single particle orbits is reported for the positive parity states of the odd-mass nucleu... | Low-spin states of odd-mass xenon isotopes | null |
2008-04-01 | Conductance properties in spin field-effect transistors (SFET) are studied by taking into account the Rashba spin-orbit coupling strength, the presence of external magnetic field, the angle between the direction of magnetization and the conductance band mismatch between the ferromagnetic contacts and the channel. It is... | Conductance properties in spin field-effect transistors | null |
2008-02-01 | Electron spin resonance investigations on single wall carbon nanotubes dispersed in polyethylene are reported. Three resonance lines were observed; a wide line assigned to magnetic iron clusters (catalyst residues), a broad and intense line originating from uncoupled electrons delocalized over the conducting domains of... | ESR investigations on polyethylene-single wall carbon nanotube composites | null |
2008-01-01 | Manipulating Electron Spins in an InGaAs/InAlAs Two-Dimensional Electron Gas | null | |
2008-01-01 | Weak anti-localization has been observed in the magneto-resistance of both symmetrically and asymmetrically doped InSb/AlInSb quantum wells. We find that for both types of structures, the magnetic field corresponding to the conductance minimum is in good agreement with the dominant spin-orbit term, which is the cubic D... | Measurement of the Dresselhaus and Rashba Spin-Orbit Coupling Via Weak Anti-Localization in InSb Quantum Wells | null |
2008-01-01 | The double pulsar J0737 – 3039A/B consists of a recycled 22-millisecond pulsar and a young 2.7-second pulsar in a highly relativistic 2.4-hour orbit. This system provides an unprecedented laboratory for testing the timing predictions of strong-field gravitational theories and for investigating the interactions of the e... | Observations of the Double Pulsar PSR J0737–3039A/B | null |
2008-01-01 | This document is part of Subvolume B ‘Linear Triatomic Molecules’, Part 9, of Volume 20 ‘Molecular Constants mostly from Infrared Spectroscopy’ of Landolt-Börnstein Group II ‘Molecules and Radicals’. Landolt-Börnstein Home Volume II/20B9 Introduction List of Symbols Table of Molecules in this Volume and Overview of II/... | 124 N_3 (NNN) | null |
2008-01-01 | Magnetoresistivity | null | |
2008-01-01 | We introduce the magnetic properties of finite-sized one-dimensional (1D) systems in the framework of the Heisenberg model and a superparamagnetic spin block model.We further analyze the experimental observation of short- and long-range ferromagnetic (FM) order in epitaxial 1D Co monatomic chains supported on a Pt subs... | Magnetism in one-dimensional metal systems | null |
2008-01-01 | In this paper we demonstrate the application of high magnetic fields to study the magnetic properties of low dimensional spin systems. We present a case study on the series of 2-leg spin-ladder compounds Na_2T_2(C_2O_4)_3(H_2O)_2 with T = Ni, Co, Fe and Mn. In all compounds the transition metal is in the T^2+ high spin... | High Field Level Crossing Studies on Spin Dimers in the Low Dimensional Quantum Spin System Na_2T_2(C_2O_2)_3(H_2O)_2 with T = Ni, Co, Fe, Mn | null |
2008-01-01 | We have used time resolved spectroscopy to measure the relaxation of spin polarisation in InSb/AlInSb quantum wells as a function of temperature and mobility. The results are consistent with the degenerate D’Yakonov-Perel (DP) mechanism over the temperature range from 77K to 300K. The spin-diffusion length in this regi... | Density and Well-Width Dependence of the Spin Relaxation in n-InSb/AlInSb Quantum Wells | null |
2008-01-01 | The structural integrity, composition and interface quality of tunnel barriers in hybrid ferromagnet-semiconductor structures will have a significant effect on the properties of spintronic devices. We present the results of a study of an amorphous MgO tunnel barrier in a Co/MgO/InAs multilayer structure. Optimum growth... | (S)TEM Characterisation of InAs/MgO/Co Multilayers | null |
2008-01-01 | In this chapter we discuss the properties of permutation groups, which are known as “Symmetric Groups” in the mathematics literature. Although permutation groups are quite generally applicable to many-body systems, they are used in this chapter to classify the symmetry in many-electron states. This discussion applies t... | Permutation Groups and Many-Electron States | null |
2008-01-01 | We investigate electron transport through resonant tunneling diodes doped with magnetic impurities. Due to exchange interaction between impurities and carriers, there arises a giant Zeeman splitting which dominates the I–V curves. We discuss a simple model which accounts for spin effects in these systems and examine it... | Spintronic Transport in II–VI Magnetic Semiconductor Resonant Tunneling Devices | null |
2008-01-01 | Electron paramagnetic resonance (EPR) signals at g ′ = 4.3 are commonly encountered in biological samples owing to mononuclear high-spin ( S = 5/2) Fe^3+ ions in sites of low symmetry. The present study was undertaken to develop the experimental method and a suitable g ′ = 4.3 intensity standard and for accurately qua... | Spin concentration measurements of high-spin (g′ = 4.3) rhombic iron(III) ions in biological samples: theory and application | null |
2007-12-01 | Isomeric states in ^214Th and ^213Th were identified by means of γ -rays measured in delayed coincidence with the implanted evaporation residues. These were produced in irradiations of ^164Dy with ^54Cr projectiles and separated in-flight by the velocity filter SHIP. An isomeric state of I ^π = 8^+ with a half-life of ... | Isomeric states in ^214Th and ^213Th | null |
2007-12-01 | We give a review of the analysis behind several examples of Dirac-type operators over manifolds arising in Clifford analysis. These include the Atiyah-Singer-Dirac operator acting on sections of a spin bundle over a spin manifold. It also includes several Dirac operators arising over conformally flat spin manifolds inc... | Aspects of Dirac Operators in Analysis | null |
2007-11-01 | We investigate the effect that Rashba spin-orbit coupling has on the low energy behaviour of a two dimensional magnetic impurity system. It is shown that the Kondo effect, the screening of the magnetic impurity at temperatures T < T _ K , is robust against such spin-orbit coupling, despite the fact that the spin of the... | The Two Dimensional Kondo Model with Rashba Spin-Orbit Coupling | null |
2007-11-01 | A formula for carrier concentration, and a relationship between mobility and diffusivity, have been presented for degenerate semiconductors with a nonparabolic energy band structure under the influence of a magnetic field. The relationships are general; they involve no approximation related to the comparative values of... | Magnetic quantization of the energy states in heavily doped semiconductors with nonparabolic energy bands | null |
2007-10-01 | We study gravitational radiation reaction in the equations of motion for binary systems with spin-orbit coupling, at order ( v / c )^7 beyond Newtonian gravity, or O ( v / c )^2 beyond the leading radiation reaction effects for non-spinning bodies. We use expressions for the energy and angular momentum flux at infinity... | Application of energy and angular momentum balance to gravitational radiation reaction for binary systems with spin-orbit coupling | null |
2007-10-01 | A nonrelativistic model of a hydrogen-like atom is considered. This model is used to calculate corrections to the energy spectrum of the atom. The analysis is based on a Hamiltonian that includes the intratomic fields generated by the electron and the nucleus. | Hyperfine structure of a hydrogen-like atom due to orbit-orbit, spin-orbit, and spin-spin interactions | null |
2007-10-01 | We consider solutions of the 2×2 matrix Hamiltonian of physical systems within the context of the asymptotic iteration method. Our technique is based on transformation of the associated Hamiltonian in the form of the first order coupled differential equations. We construct a general matrix Hamiltonian which includes a ... | Solution of spin-boson systems in one and two-dimensional
geometry via the asymptotic iteration method | null |
2007-09-01 | The relativistic ground and low-lying excited state potential energy curves of AgH and AuH in the presence of a cylindrical harmonic confining potential were calculated using the multi-state multi-reference perturbation theory with the spin-free no-pair Hamiltonian obtained via the third-order Douglas–Kroll transformat... | Relativistic calculations on the ground and excited states of AgH and AuH in cylindrical harmonic confinement | null |
2007-09-01 | The electron paramagnetic resonance parameters, zero-field splittings (ZFSs) b _2 ^0 , b _4 ^0 , b _4 ^4 , b _6 ^0 , b _6 ^4 and the g factors for Gd^3+ on the tetragonal Y^3+ site in KY_3F_10 are theoretically studied from the superposition model for the ZFSs and the approximation formula for the g factor containing t... | Electron paramagnetic resonance parameters and local structure for Gd^3+ in KY_3F_10
| null |
2007-09-01 | We propose a new scheme of spin filtering employing ballistic nanojunctions patterned in a two dimensional electron gas (2DEG). Our proposal is essentially based on the spin-orbit (SO) interaction generated by a lateral confining potential (β-SO coupling ). We demonstrate that the flow of a longitudinal unpolarized cur... | Spin hall accumulation in ballistic nanojunctions | null |
2007-09-01 | Versatile peroxidases are a new class of ligninolytic enzymes secreted by fungi from the group of white-rot basidiomycetes. Versatile peroxidase (VP) is a structural hybrid between lignin and manganese peroxidase. This hybrid combines the catalytic properties of the two above peroxidases being able to catalyze Mn(II)-d... | Tryptophan radicals as reaction intermediates in versatile peroxidases: Multifrequency EPR, ENDOR and density functional theory studies | null |
2007-09-01 | Some new complexes were synthesized using pyrol-2-carbaldhyde thiocarbohydrazone ligand and characterized using physicochemical techniques. The i.r. data reveal that, the ligand acts as a mononegative tetradentate in Ni^II and Cu^II binuclear complexes. Also, they coordinate as mononegative tridentates with Co^II, Cd^I... | Synthesis and spectral characterization of some investigated thiocarbohydrazone binuclear complexes with an illustrated EPR study for d^1 complexes | null |
2007-08-01 | We present a theoretical study of the spin-dependent conductance spectra in a FM/semiconductor quantum-dot (QD)/FM system. Both the Rashba spin-orbit (SO) coupling in the QD and spin-flip scattering caused by magnetic barrier impurities are taken into account. It is found that in the single-level QD system with paralle... | Spin-dependent conductance in FM/quantum-dot/FM tunneling system | null |
2007-08-01 | The electronic structure, spin splitting energies, and g factors of paramagnetic In_1-xMn_xAs nanowires under magnetic and electric fields are investigated theoretically including the sp-d exchange interaction between the carriers and the magnetic ion. We find that the effective g factor changes dramatically with the m... | Electronic structure of paramagnetic In_1-xMn_x As nanowires | null |
2007-08-01 | The magnetic properties of Cu^2+, Cr^3+, and Mn^2+ ions in the newly reported 12- and 15-membered macrocyclic complexes are analysed by a theoretical approach. The calculated magnetic moment and magnetic anisotropy for various situations, especially for Cu(II) ion, suggest that the magnetic properties may lead to a bet... | Theoretical approach to the magnetic properties of Mn(II), Cr(III), and Cu(II) complexes in the newly reported 12- and 15-membered macrocyclic ligands | null |
2007-07-01 | We deduce the explicit form of a phase-locked (PL) tetrad, adapted to a small spinning particle (a test gyroscope ) following an arbitrary geodesic orbit in the Schwarzschild geometry of a gravitational source. We subsequently obtain the analytic expression of the gyroscopic precessional velocity Ω in a non-circular or... | Gyroscopic precession in non-circular orbits: a phase-locked tetrad approach | null |
2007-07-01 | Trigonal bipyramidal spin clusters with orbitally degenerate 5d cyano complexes [Os^III(CN)_6]^3−, prototypes of high-temperature single-molecule magnets | null | |
2007-06-01 | In this work we derive a pair of nonlinear eigenvalue problems corresponding to the one-band effective Hamiltonian accounting for the spin-orbit interaction governing the electronic states of a quantum dot. We show that the pair of nonlinear problems allows for the minmax characterization of its eigenvalues under certa... | Stationary Schrödinger equations governing electronic states of quantum dots in the presence of spin-orbit splitting | null |
2007-06-01 | Magnetic properties of Nd_0.5Sr_0.5Mn_1− x (Ga_ x ,Ti_ x )O_3 system (0.04⩽ x ⩽0.4) were investigated through magnetization and electron spin resonance (ESR) measurements. It was observed that a small amount of Ti substitution for Mn will destroy the charge-ordering (CO) phase completely and induce the cluster-spin-gla... | Charge order and spin order in Nd_0.5Sr_0.5Mn_1−x
(Ga_
x
, Ti_
x
)O_3 system | null |
2007-06-01 | Nucleon-nucleon interaction is constructed in the J -matrix inverse scattering approach developed by us. The interaction has the form of a matrix in the oscillator basis in each partial wave. The rank of the matrix is not large though the description of the NN scattering data is comparable in quality with that provided... | Nonlocal inverse-scattering nucleon-nucleon interaction and spectra of s-and p-shell nuclei | null |
2007-05-01 | We present several complete systems of integrability conditions on the density of the Hamiltonian of a spin chain matrix. The corresponding formulas for R-matrices are also given. The latter are expressed via the local Hamiltonian density in a form similar to spin one half XXX and XXZ models. The result is applied to t... | Defining relations on the Hamiltonians of XXX and XXZ R-matrices and new integrable spin-orbital chains | null |
2007-05-01 | In this work, we investigate the thermal entanglement for interacting spin systems $$H=3(\vec{\sigma}_{1}\cdot\vec{n})(\vec{\sigma}_{2}\cdot\vec{n})-\vec{\sigma}_{1}\cdot\vec{\sigma}_{2}+B(\sigma_{1}^{z}+\sigma_{2}^{z})$$ , by varying the parameters of temperature T , direction $$\vec{n}$$ and magnetic field B . | Thermal Entanglement for Interacting Spin-1/2 Systems and its Quantum Criticality | null |
2007-03-01 | By analogy with the classic effect of the double refraction of light, we investigate the relevant effect of an electron entering from the Non-Rashba region to the Rashba region in two-dimensional systems. It is shown that the effect of electronic double refraction is determined by a combined parameter γ = m ^* λ _F α /... | Electronic double refraction due to the Rashba effect: Analytical and numerical results | null |
2007-03-01 | Complexes of Cr(III), Mn(II), Fe(III), Co(II), Ni(II), Cu(II), Pd(II), Pt(II), Ru(III) and Ir(III) with a sixteen-membered 1,5:11,15-dimetheno-2,4,10,12-tetramethyl-[1,5,9,13]-tetraazahexadeca-1,3,5,6,10,11,13,15,16,20-decene macrocyclic ligand have been synthesized. These complexes are characterized by magnetic moment... | Synthesis and spectral studies of transition metal complexes with 1,5:11,15-dimetheno-2,4,10,12-tetramethyl-[1,5,9,13]-tetraazahexadeca-1,3,5,6,10,11,13,15,16,20-decene a sixteen-membered tetradentate macrocyclic ligand | null |
2007-03-01 | Electron paramagnetic resonance studies at multiple frequencies (MF EPR) can provide detailed electronic structure descriptions of unpaired electrons in organic radicals, inorganic complexes, and metalloenzymes. Analysis of these properties aids in the assignment of the chemical environment surrounding the paramagnet a... | Multifrequency pulsed EPR studies of biologically relevant manganese(II) complexes | null |
2007-02-01 | Electron spin resonance (ESR) was studied in Kondo dielectric SmB_6 doped with 1 at.% of Fe. The ESR measurements were performed on single crystal of SmB_6 in the temperature range 10–300 K. We have observed two resonance lines with g -factors of 2.25 and 3.0 indicating the presence of iron in Fe^0 and Fe^2+ states. Fe... | Investigation of ESR on Fe Ions in Kondo Dielectric SmB_6
| null |
2007-01-01 | Density functional methods have been applied to calculate the quadrupole splitting of a series of iron(II) spin crossover complexes. Experimental and calculated values are in reasonable agreement. In one case spin-orbit coupling is necessary to explain the very small quadrupole splitting value of 0.77 mm/s at 293 K for... | DFT calculations as a tool to analyse quadrupole splittings of spin crossover Fe(II) complexes | null |
2007-01-01 | Spin Momentum and the Pauli Principle (Spin-statistics Theorem) | null | |
2007-01-01 | The measurement of very short spin-lattice, or longitudinal, relaxation (SLR) times ( i.e. , 10^−10 < T _1 < 10^−6 s) is of great importance today for the study of relaxation processes. Recent case studies include, for example, glasses doped with paramagnetic ions ( Vergnoux et al., 1996 ; Zinsou et al., 1996 ), amorph... | Microwave Amplitude Modulation Technique to Measure Spin-Lattice (T
_1) and Spin-Spin (T
_2) Relaxation Times | null |
2007-01-01 | Fits to Mössbauer spectra of high-spin iron(II) porphyrinates have been applied to the Fe(II) model compounds octaethylporphyrin(1,2-dimethylimidazole) and tetra-paramethoxyporphyrin(1,2-dimethylimidazole). Mössbauer spectra have been measured on these compounds at 4.2 K in large applied fields. Spin Hamiltonians were ... | On Spin Hamiltonian fits to Mössbauer spectra of high-spin Fe(II) porphyrinate systems | null |
2007-01-01 | Local vs. Global Variables for Spin Glasses | null | |
2007-01-01 | Room temperature Raman spectra of synthesized powder (Fe_xMg_1− x )_2SiO_4 solid solutions are obtained. Frequency trend of all modes versus composition shows clearly the existence of a step at x = 0.3. A step-like behavior of vibration frequencies at the given composition that coincides with the percolation threshold ... | Raman spectra of olivine solid solutions (Fe_xMg_1−x
)_2SiO_4 and spin-vibration interaction | null |
2006-12-01 | Pyrene-tetramethylpiperidinyl (Pyr-Tempo) as a spin label fluorescent probe for iron(II) was synthesized. It exhibited weak fluorescence (λ_exc/λ_em = 346/399 nm) in aqueous solution due to an intramolecular quenching pathway. A method for determination of iron(II) was proposed based on the fluorescence enhancement of ... | Fluorescence enhancement assay for trace iron(II) using Pyr-tempo as a spin label fluorescent probe | null |
2006-11-01 | The light-induced excited spin state trapping (LIESST) is a well known phenomenon in an iron(II) spin-crossover (SCO) material which offers some interesting prospects in data storage. In this work, we present a typical investigation of the photomagnetic properties of a SCO material. At the surface of the sample, the li... | A typical example of a photomagnetic study carried out on a spin-crossover material | null |
2006-11-01 | For an ideal one-dimensional ferromagnetic wire with a magnetic domain wall (DW), contribution of the DW to the resistivity of the system has been investigated. We have studied the resistance due to the magnetic impurities in the domain wall which was suspended in a weak magnetic field for two types of chiralities. The... | Magnetic field dependence of the domain wall resistance in a quantum
wire | null |
2006-09-01 | The magnetic moments of a Co(II) complex in a recently reported CoL_2·5H_2O compound (L is 5-chloro-2-methoxybenzoate, ClC_6H_3(OCH_3)COO^−) were studied by a semi-theoretical approach in the vicinity of tetragonal distortion. It was found that in order to obtain the observed temperature-dependent magnetic moments, som... | Theoretical approach to the magnetic properties of Co(II) ion in CoL_2·5H_2O compound (L is 5-chloro-2-methoxybenzoate) | null |
2006-08-01 | The β decay of ^94Pd and of the 71s isomer of ^94Rh was investigated by using total γ-ray absorption techniques. Several levels in ^94Rh are established, including a new low-lying isomer characterized by a half-life of 0.48(3)μs and a de-exciting transition of 55keV. E 2 multipolarity is determined for this transition ... | Beta decay of ^94Pd and of the 71 s isomer of ^94Rh | null |
2006-07-01 | For a series of Mo(V) oxyhalide complexes MoOL _5 ^2− (L = F, Cl, Br, I), interpretation of the ligand hyperfine coupling parameters ( A ^L tensor components) is considered. The role of spin polarization is elucidated and the effect of charge transfer states is taken into account. The A ^L tensor components were calcul... | Ligand hyperfine coupling in Mo(V) oxyhalide complexes | null |
2006-06-01 | The spin symmetry in antinucleon spectra of a nucleus is tested by investigating the relations between the Dirac wave functions of the spin doublets and examining these relations in realistic nuclei within the relativistic mean-field model. In addition to the fact that the dominant components of the Dirac spinors of th... | Test of spin symmetry in anti-nucleon spectra | null |
2006-06-01 | We have investigated the mesoscopic transport through the system with a quantum dot (QD) side-coupled to a toroidal carbon nanotube (TCN) in the presence of spin-flip effect. The coupled QD contributes to the mesoscopic transport significantly through adjusting the gate voltage and Zeeman field applied to the QD. The c... | Charge and spin currents tunnelling through a toroidal carbon
nanotube side-coupled with a quantum dot | null |
2006-06-01 | In this work, an electron paramagnetic resonance (EPR) strategy to study the heme-pocket structure of low-spin ferric heme proteins is optimized. Frozen solutions of ferric mouse neuroglobin (mNgb) are analyzed by means of electron spin echo envelope modulation and pulsed electron–nuclear double resonance techniques. T... | Analyzing heme proteins using EPR techniques: the heme-pocket structure of ferric mouse neuroglobin | null |
2006-04-01 | The effect of Al substitution for Fe on crystal structure, magnetostriction and spontaneous magnetostriction, anisotropy and spin reorientation of a series of polycrystalline Tb_0.3Dy_0.7(Fe_1− x Al_x)_1.95 alloys ( x = 0, 0.05, 0.1, 0.15, 0.20, 0.25, 0.30, 0.35) at room temperature and 77 K was investigated systematic... | Structure, spin reorientation and Mössbauer effect studies of Tb_0.3Dy_0.7(Fe_1−x
Al_x)_1.95 alloys | null |
2006-03-01 | In this study the scissors mode 1^+ states are systematically investigated within the rotational invariant Quasiparticle Random Phase Approximation (QRPA) for ^130-136Ba isotopes. We consider the 1^+ vibrations generated by the isovector spin-spin interactions and the isoscalar and isovector quadrupole-type separable f... | Low-lying magnetic dipole strength distribution in the γ-soft even-even ^130-136Ba | null |
2006-03-01 | A simple approach is presented to estimate the position of the first opposite-parity state for p- and sd-shell nuclei. The approach is based on the assumption that the quadrupole-quadrupole interaction determines the energy of the lowest-lying states, and they are a mixture of a few leading SU (3) irreps even in the pr... | A simple interpretation of global trends in the lowest levels of p- and sd-shell nuclei | null |
2006-02-01 | Systematic first-principles analysis of the energy level schemes and ground state absorption spectra of trivalent chromium in ZnAl_2S_4 and ZnGa_2O_4 crystals has been performed in the present paper. The recently developed first-principles approach to the analysis of the absorption spectra of impurity ions in crystals ... | Comparative first-principles analysis of the absorption spectra of
ZnAl_2S_4 and ZnGa_2O_4
crystals doped with Cr^3+
| null |
2006-01-01 | In our study of the helium atom we saw that the first approximation to the ground state energy was obtained by ignoring the electron—electron repulsion, thus making the Hamiltonian separable into the sum of two terms, each containing variables of a different electron. When a Hamiltonian is separable in this fashion the... | Multielectron Atoms | null |
2006-01-01 | Periodic Table | null | |
2006-01-01 | Classification into classes of superconductors with singlet and triplet pairing, respectively, needs information on the parity and spin state of the pairing state. These information can be accessed through measurements in a magnetic field due to the di.erent response of the pairs with S = 0 and S = 1, respectively, on ... | Probing the Parity and Spin State | null |
2006-01-01 | We present routes to quantum information processing in solids. An introduction to electron and nuclear spins as quantum bits (qubits) is given and basic quantum algorithms are discussed. In particular we focus on the preparation of pseudo pure states and pseudo entangled states in solid systems of combined electron and... | En Route to Solid State Spin Quantum Computing | null |
2006-01-01 | Polarized Beams in Other Very-High-Energy Proton Accelerators | null | |
2006-01-01 | The basic methodology and development of the spin Hamiltonian method as well as the terminology and symbols used in EPR developed out of atomic spectroscopy. Therefore it is useful to review how atomic spectroscopy of atoms and ions dealt with the Zeeman effect, which is the effect of a magnetic field on atomic spectra... | EPR: Principles | null |
2006-01-01 | We discuss AdS/CFT duality in the sector of “semiclassical” string states with large quantum numbers. We review the coherent-state effective action approach, in which similar 2d sigma model actions appear from the AdS _5 × S ^5 string action and from the integrable spin chain Hamiltonian representing the N=4 super Yang... | Semiclassical Strings and AdS/CFT | null |
2006-01-01 | Atomic Clocks | null | |
2006-01-01 | Mass-filtered cobalt clusters with a size between 5 nm and 12 nm have been deposited in situ under soft-landing conditions onto epitaxially ordered iron and nickel films. The spin and orbital moments of both the clusters as well as the substrate films have been investigated using the element-specific method of X-ray ma... | Mass-filtered cobalt clusters in contact with epitaxially ordered metal surfaces | null |
2006-01-01 | We present an overview of the European Space Agency’s Planck mission, its scientific objectives and the main elements of its technical design. The current programmatic status of Planck within ESA’s Scientific Programme, implementation plans, and near-term milestones are also outlined. | THE PLANCK MISSION | null |
2006-01-01 | Since the expected rates for neutralino-nucleus scattering are expected to be small, one should exploit all the characteristic signatures of this reaction. Such are: (i) In the standard recoil measurements the modulation of the event rate due to the Earth’s motion. (ii) In directional recoil experiments the correlation... | Exploring Novel Signatures in Direct Neutralino Searches | null |
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