publicationDate stringlengths 10 10 | abstract stringlengths 0 37.3k | title stringlengths 1 5.74k | doi stringlengths 11 47 ⌀ |
|---|---|---|---|
2005-09-01 | We investigate mesoscopic transport through a system that consists of a central quantum dot (QD) and two single-wall carbon nanotube (SWCN) leads in the presence of a rotating magnetic field. The spin-flip effect is induced by the rotating magnetic field, and the tunnelling current is sensitively related to the spin-fl... | Spin-flip mesoscopic transport through a quantum dot coupled to carbon nanotube terminals | null |
2005-09-01 | Coordination of dinitrogen to Sellmann-type iron (II) complexes in a sulfur-dominated coordination sphere, which emulates the environment of iron centers in the FeMo-cofactor of nitrogenase, is analyzed with respect to spin states, spin barriers, and the effect of trans -ligands. Such detailed investigations became onl... | Analysis of spin states, spin barriers, and trans-effects involved in the coordination and stabilization of dinitrogen by biomimetic iron complexes | null |
2005-07-01 | Tetragonal paramagnetic centers with spin S = 7/2 were detected in x-ray-irradiated BaF_2: Fe ( c _Fe ≈ 0.002 at. %) crystals using the EPR method. Electronic transitions between the |±1/2〉 states of a Kramers doublet were observed in the X and Q ranges. In the EPR spectra of the tetragonal centers, a ligand hyperfine ... | EPR study of impurity iron ion clusters in BaF_2 crystals | null |
2005-06-01 | We propose a ballistic magneto-electric device that permits conductance modulation with both electric and magnetic fields applied perpendicular to its current conduction channel. Fields are applied through the ferromagnetic gates deposited on top of a HEMT heterostructure that contains a 2DEG for current conduction. Th... | Magnetoelectric Spin-FET for Memory, Logic, and Amplifier Applications | null |
2005-06-01 | We have recently developed a method of studying spin diffusion coefficients by doping the materials with paramagnetic centers and measuring the nuclear relaxation in a tilted rotating frame. Using this method, we measure here the spin diffusion coefficient of orthoterphenyl, a molecular organic glass, and of three poly... | Measurement of the nuclear spin diffusion coefficient in organic glasses doped with paramagnetic centers: Orthoterphenyl and polymeric glasses | null |
2005-04-01 | We present a theoretical study of the spectral and the spin-dependent transport properties of a few electron semiconductor parallel double quantum dot (DQD) in the presence of local induced Zeeman splittings at the quantum dots. Working in an extended Hubbard model and treating the coupled QD as a single coherent syste... | Spin Filter Effect in a Parallel Double Quantum Dot | null |
2005-04-01 | We systematically studied spin-orbit (SO) interaction in narrow wires with a variety of widths, using two different approaches. Etched wires were used in the first approach, while side-gate wires were used in the second. To determine the SO coupling constant, α, we measured magneto-resistances at 1.6 K. α remained almo... | Spin-Splitting Transport in Narrow-Gap Heterojunction Narrow Wires | null |
2005-04-01 | We have studied theoretically the interplay between quantum interference and spin-orbit coupling in electron interferometers realized in semiconductor nanostructures. The correlation between spin quantization axis and propagation direction for electrons with fixed energy results in the appearance of spin-dependent inte... | Spin-Dependent Electron Interferometers | null |
2005-02-01 | The magnetic properties of 3d-metal clusters significantly differ from bulk behavior and, for small clusters, strongly depend on the number of atoms within each cluster. Such phenomena are caused by a narrowing of electronic states and the high ratio of surface to volume atoms giving rise to enhanced magnetic orbital m... | Magnetism of mass-filtered nanoparticles on ferromagnetic supports | null |
2005-01-01 | The spin—orbit induced electric field gradient in cubic ferromagnets has been observed experimentally in the past for many systems. Even its dependence on the orientation of the magnetisation with respect to the crystallographic axes could be convincingly demonstrated. A fully relativistic description is presented that... | Spin-orbit Induced Electric Field Gradients in Magnetic Solids | null |
2005-01-01 | The spins of localized electrons in silicon are strong candidates for quantum information processing because of their extremely long coherence times and the integrability of Si within the present microelectronics infrastructure. This paper reviews a strategy for fabricating single electron spin qubits in gated quantum ... | Spin-based Quantum Dot Quantum Computing in Silicon | null |
2005-01-01 | It is highly desirable to explore robust half-metallic ferromagnetic materials compatible with important semiconductors for spintronic applications. A state-of-the-art full potential augmented plane wave method within the densityfunctional theory is reliable enough for this purpose. In this chapter we review theoretica... | Half-Metallic Ferromagnetism and Stability of Transition Metal Pnictides and Chalcogenides | null |
2005-01-01 | Electron Transport in Magnetic Multilayers | null | |
2005-01-01 | Phase shifts and resonance energies | null | |
2005-01-01 | Starting from an oriented three-dimensional Euclidean space as a subspace of the quaternions we introduce a simple transmission of information. The Euclidean space is split into a plane carrying information and a line of information transmission, thus having the structure of a Heisenberg algebra. The plane together wit... | The Heisenberg Group in Classical and Quantum Information Transmission | null |
2005-01-01 | The structure of isomers in N ∼82 nuclei is reinvestigated. It is pointed out that the quasi-spin structure survives in the isomers and the final states of their decays, as apartial dynamical symmetry Using this group structure, an extended seniority reduction formula is derived and the presence of pair excitations out... | Survival of Quasi-Spin Structure in Isomers of N ∼ 82 Nuclei | null |
2005-01-01 | Oxygen molecule adsorptions on a Pu(100) surface have been studied in detail, using the generalized gradient approximation to density functional theory. Dissociative adsorption with a layer by layer alternate spin arrangement of the plutonium layer is found to be energetically more favorable compared to molecular adsor... | A density functional study of molecular oxygen adsorption and reaction barrier on Pu (100) surface | null |
2005-01-01 | Light propagating through a semiconductor and acting upon mobile carriers can generate a dc electric current, under short-circuit condition, or a voltage, in case of open-circuit samples. | Circular Photo-Galvanic and Spin-Galvanic Effects | null |
2005-01-01 | Exchange Effects in the Outer Shell Ionisation of Xenon | null | |
2005-01-01 | In this talk I shall introduce our recent works on general pairing interactions and pair truncation approximations for fermions in a single- j shell, including the spin zero dominance, and features of eigenvalues of fermion systems in a single- j shell interacting by a J -pairing interaction. | J-Pairing Interractions of Fermions in a Single-J Shell | null |
2004-12-01 | We claim that the observed large reduction of the effective moment and the drastic violation of the Curie-Weiss law in Na_2V_3O_7 (Phys. Rev. Lett. 90 (2003) 167202) is caused by conventional crystal-field interactions and the intra-atomic spin-orbit coupling of the V^4+ ion. According to the Quantum Atomistic Solid-St... | Spin-orbit Coupling Origin of Large Reduction of the Effective Moment in Na_2V_3O_7
| null |
2004-12-01 | Iron(III) complexes of highly saddled dodecaphenylporphyrin, Fe(DPP)X (X=Cl, Br or I) have been prepared and characterized by Mössbauer, UV–Vis and magnetic measurements. The Mössbauer spectra, recorded at temperatures from 5 to 300 K, contain two components A and B. Component A is attributed to iron(III) in a spin-adm... | Spin States of Iron(III) in Highly Saddled Dodecaphenylporphyrin Complexes | null |
2004-12-01 | Optical spin orientation of electrons (holes) in radiative transitions stimulated by circularly polarized photons is considered. It is shown that this effect can be used to advantage in developing an optical generator of spin-polarized carriers operating on a principle similar to that of a semiconductor laser. | Electron spin orientation under optically stimulated radiative recombination | null |
2004-11-01 | The Ca_3Ru_2O_7 with a Mott-like transition at 48 K and a Neel temperature at 56 K features different in-plane anisotropies of magnetization and magnetoresistance. Applying the magnetic field along the magnetic easy axis precipitates a spin-polarized state via a first-order metamagnetic transition but does not lead to ... | Destruction of an orbitally ordered and spin-polarized state: Colossal magnetoresistance in Ca_3Ru_2O_7
| null |
2004-10-01 | The spins of localized electrons in silicon are strong candidates for quantum information processing because of their extremely long coherence times and the integrability of Si within the present microelectronics infrastructure. This paper reviews a strategy for fabricating single electron spin qubits in gated quantum ... | Spin-Based Quantum Dot Quantum Computing in Silicon | null |
2004-10-01 | Magnetic characteristics of the dinuclear complex (2,3-Me_2C_5H_3N)_2Fe_2(μ-OOCCMe_3)_4 ( 1 ) were studied in the temperature interval 2–300 K. The magnetic behavior of complex 1 was interpreted in terms of the orbital-dependent exchange theory with allowance for the temperature dependence of the populations of the spl... | Magnetic properties of a dinuclear complex (2,3-Me_2C_5H_3N)_2Fe_2(μ-OOCCMe_3)_4 with “China lantern” structure | null |
2004-09-01 | High-spin states in^145Tb have been populated using the^118Sn (^32S, 1p4n) reaction at beam energy of 165 MeV. The level scheme of^145Tb has been established up to Ex ≈7.4 MeV. The level scheme shows characteristics of a spherical or slightly oblate nucleus. Based on the systematic trends of the level structure in the ... | Multi-quasiparticle excitations in^145Tb | null |
2004-08-01 | Oxygen adsorptions on $\delta $ -Pu (100) and (111) surfaces have been studied at both non-spin-polarized and spin-polarized levels using the generalized gradient approximation of density functional theory (GGA-DFT) with Perdew and Wang (PW) functionals. The center position of the (100) surface is found to be the most ... | Electronic structures and bonding of oxygen on plutonium layers | null |
2004-05-01 | The quantal symmetry property in the CP1 non-linear sigma model with Abelian–Maxwell–Chern–Simons (AMCS) term in 2 + 1 dimensions is studied. In the Coulomb gauge, the system is quantized in the Faddeev–Senjanovic (FS) path-integral formalism. The canonical Ward identities for proper vertices under local gauge transfor... | Quantal Symmetries in the Non-Linear Sigma Model with Maxwell–Chern–Simons Term | null |
2004-04-01 | The paper develops a hamiltonian formulation describing the coupled orbital and spin motions of a rigid Mercury rotation about its axis of maximum moment of inertia in the frame of a 3:2 spin orbit resonance; the (ecliptic) obliquity is not constant, the gravitational potential of mercury is developed up to the second ... | The Spin-Orbit Resonant Rotation of Mercury: A Two Degree of Freedom Hamiltonian Model | null |
2004-01-01 | Constrained by the use of an “average-of-configuration” computation, Kohn-Sham-DFT allows identification of the complete set of d^q states of the ligand field plus repulsion model, LFR. A one-to-one correspondence is assumed between states defined by integer occupation numbers of real KS spin orbitals and single-determ... | Elucidation of Ligand-Field Theory. Reformulation and Revival by Density Functional Theory | null |
2004-01-01 | Atoms comprising more than one electron are much more complicated to analyze than the simple one-electron atom. The major reasons for the difficulties are as follows. | Multi-Electron Atoms: The Building Blocks that Produce the Tremendous Variety of Molecules | null |
2004-01-01 | In addition to the colossal magnetoresistive manganites introduced in Sect. 4.1, the transition metal oxides with light transition metal ions, such as Ti and V, are recognized to be an alternative class of materials with orbital degrees of freedom. Except for compounds where the formal valence of Ti V is 4+ (5+), such ... | Titanates and Vanadates | null |
2004-01-01 | Devices for nano- and molecular size electronics should allow for an efficient current rectification and switching. A few molecular scale devices are analyzed here on the basis of first-principles and model approaches. Current rectification by molecular quantum dots can produce the rectification ratio ≲ 100. Current sw... | Charge and Spin Transport in Organic Nanosystems: Rectification, Switching, and Spin Injection | null |
2004-01-01 | DFT is often used to predict the energetics of transition metal compounds. In particular, energy differences between states of different spin are of great interest. This review discusses the accuracy of such computations for spin-state splittings of monometallic complexes where the differences in spin-pairing occur mos... | DFT Computation of Relative Spin-State Energetics of Transition Metal Compounds | null |
2004-01-01 | Probably the most famous ring structure occurring in nature is the benzene molecule. Its structure has been suggested by Kekulé^1 as early as 1865. In physics, ring structures became especially important in connection with the Aharonov-Bohm effect [591 and related phenomena [66, 292]. | Energy spectra of quantum rings | null |
2004-01-01 | High quality ZnO single-crystal films were doped with copper by thermal diffusion, and their luminescent properties were studied by cathodoluminescence spectroscopy. Doping with copper increases the intensity of the green-emission band of the cathodoluminescence spectrum, whose peak, width, and shape at 78 and 300 K re... | Green luminescence band of zinc oxide films copper-doped by thermal diffusion | null |
2004-01-01 | This chapter considers thermal spin crossover occurring in transition metal compounds other than those of Fe(II), Fe(III) and Co(II). Unusual magnetic properties of several coordination and organometallic complexes of Mn(II), Mn(III), Cr(II) and Co(III) are discussed in the light of their structural features. | Thermal Spin Crossover in Mn(II), Mn(III), Cr(II) and Co(III) Coordination Compounds | null |
2004-01-01 | In this chapter, we shall meet up with some approaches to treating the multi- or many-electron problem in molecular physics and quantum chemistry. Among them are the Slater determinant approach and the Hartree-Fock equations to which it leads, which we will discuss for both closed and open electronic shells. An importa... | The Multi-Electron Problem in Molecular Physics and Quantum Chemistry | null |
2003-12-01 | We study the scattering of an electron of a 2DEG through a large point contact separating a region where the electrons are free and a region where the Rashba spin-orbit coupling is present. The scattering depends dramatically on the electron incidence angle showing double refraction within the Rashba region. For incide... | Conductance of a large point contact with Rashba effect | null |
2003-11-01 | Two-level systems (TLS) interacting with conduction electrons are possibly described by the two-channel Kondo Hamiltonian. In this case the channel degeneracy is due to the real spin of the electrons. The possibility of breaking that degeneracy (conservation) has interest on his own. In fact, we show that the interacti... | Can the spin-orbit interaction break the channel degeneracy (conservation) of the two-channel orbital Kondo problem? | null |
2003-10-01 | The electric dipole moment and the static dipole polarizability of the hydrogen iodide molecule were studied using sophisticated correlated and relativistic methods. Both scalar and spin–orbit relativistic effects were carefully accounted for. We conclude that the large differences between the theoretical and experimen... | Electric properties of hydrogen iodide: Reexamination of correlation and relativistic effects | null |
2003-10-01 | The ^15N-HSQC spectra of low-spin cyano-met-myoglobin and high-spin fluoro-met-myoglobin were assigned and dipole-dipole-Curie-spin cross-correlated relaxation rates measured. These cross-correlation rates originating from the dipolar ^1H-^15N interaction and the dipolar interaction between the ^1H and the Curie spin o... | Angular dependence of dipole-dipole-Curie-spin cross-correlation effects in high-spin and low-spin paramagnetic myoglobin^**
| null |
2003-09-01 | By time-resolved electron paramagnetic resonance (TREPR), four (tetraphenylporphinato) zinc (ZnTPP) complexes coordinated by an axial ligand containing a nitroxide radical (NRX; X=4, 5, 8, and 10, denotes the bond number from zinc to nitroxide nitrogen) have been studied in terms of magnetic interactions between the ph... | Time-resolved EPR studies on magnetic interactions between excited triplet (tetraphenylporphinato) zinc and doublet nitroxide radical | null |
2003-08-01 | We have recently calculated shot noise for entangled and spin-polarized electrons in novel beam-splitter geometries with a local Rashba orbit–spin (s-o) interaction in the incoming leads. This interaction allows for a gate-controlled rotation of the incoming electron spins. Here we present an alternate simpler route to... | Probing Entanglement via Rashba-Induced Shot Noise Oscillations | null |
2003-08-01 | A large Rashba spin splitting has been observed in the first conduction subband of n -type modulation doped HgTe quantum wells with an inverted band structure via an investigation of Shubnikov–de Haas oscillations as a function of gate voltage. Self-consistent Hartree calculations of the band structure based on an 8 × ... | Very Large Rashba Spin–Orbit Splitting in HgTe Quantum Wells | null |
2003-06-01 | High-spin states in^141Nd have been studied using in-beam γ-ray spectroscopic techniques via the^130Te(^16O, 5nγ)^141Nd reaction. The level scheme of^141Nd has been extended up to an excitation energy of 7614.5 keV including 12 new γ rays deexciting 15 new levels. According to particle-vibrator coupling and semi-empiri... | Particle-core coupling in^141Nd | null |
2003-06-01 | The integrated-intensity ratio R of the L _β and L _α lines in x-ray emission spectra of 3 d transition metal oxides was measured. The magnitude of the ratio was found to depend nonmonotonically on the atomic number of the 3 d elements, with a sharp rise in the middle of the series. In terms of the theory of one-electr... | Effect of atomic magnetic moments on the relative intensity of the L
_β and L
_α components in x-ray emission spectra of 3d transition metal oxides | null |
2003-06-01 | A spin-Hamiltonian that describes the orientational energy of nanoscopic magnetic particles is presented. A few short observations on spin tunneling are made. Basic ideas on superparamagnetism and classical results of calculations of relaxation times are presented. A model for spin–phonon interaction induced spin rever... | Methods of Simulating Superparamagnetic Relaxation Mössbauer Spectra and Attempts of Foundation of a Microscopic Theory of Superparamagnetism | null |
2003-04-01 | An electronic beam splitter with a local Rashba spin–orbit coupling can serve as a detector for spin-polarized currents. The spin–orbit coupling plays the role of a tunable spin rotator and can be controlled via a gate electrode on top of the conductor. We use spin-resolved scattering theory to calculate the zero-tempe... | Noise of Spin-Polarized Currents at a Beam Splitter with Local Spin–Orbit Interaction | null |
2003-04-01 | The length over which electron spins reverse direction due to the Rashba effect when injected with an initial polarization along the axes of a quantum wire is investigated theoretically. A soft wall confinement of the wire renormalizes the spin–orbit parameter (and the effective mass) stronger than hard walls. Electron... | Rashba Precession in Quantum Wires | null |
2003-04-01 | Zero-magnetic-field spin splitting in InGaAs/GaAs and GaAs/AlGaAs multiple quantum wells was investigated theoretically. The sp^3s* empirical tight-binding method has been employed. It has been found that the splitting is much larger in InGaAs wells than that in GaAs wells. The origin of the splitting due to the struct... | Zero-Magnetic-Field Spin Splitting of Conduction Subbands in InGaAs/InAlAs and GaAs/AlGaAs Quantum Wells | null |
2003-04-01 | In 1996, it was suggested by K. J. Thomas et al. ( Phys. Rev. Lett. 77, 135 (1996)) that 0.7(2e^2/h) conductance structure in Quasi-1DEG (Q1DEG) at GaAs/AlGaAs heterostructure might be related to spin polarization at zero magnetic field. We have recently studied spontaneous spin-splitting in the 2DEGs formed at normal ... | Observation of e^2/h Conductance Steps in a Side-Gate Point Contact on In_0.75Ga_0.25As/In_0.75Al_0.25As Heterostructure | null |
2003-04-01 | A bimetallic nickel(II) complex with the ligand Hsalamp (2-[(4-methyl-pyridin-2-ylimino)-methyl]-phenol), having the molecular formula, Ni_2C_26H_22 N_4O_10Cl_2, is synthesized and characterized by elemental, UV-Vis, IR and EPR studies. The IR spectrum confirms the presence of coordinated perchlorate ion and the UV-Vis... | Synthesis and room temperature single crystal EPR studies of a dinickel complex having an Ni_2(μ-phenoxide)_2
^2+ unit supported by a macrocyclic ligand environment [Ni_2(L)_2(OClO_3)_2] [L = 2-[(4-methyl-pyridin-2-ylimino)-methyl]-phenol] | null |
2003-03-01 | We start from a parity-breaking MCS QED_3 model with spontaneous breaking of the gauge symmetry as a framework for evaluation of the electron-electron interaction potential and for attainment of numerical values for the e ^ - e ^ - - bound state. Three expressions ( V _ eff , V _ eff , V _ eff ) are obtained according ... | Electron-electron bound states in Maxwell-Chern-Simons-Proca QED _
3
| null |
2003-03-01 | A pronounced Curie-like upturn of the magnetic susceptibility x (T) of the quasi one-dimensional spin chain compound Ba_2V_3O_9 has been found recently [1]. Frequently this is taken as a signature for a staggered field mechanism due to the presence of g -factor anisotropy and Dzyaloshinskii-Moriya interaction. We calcu... | Magnetic susceptibility in quasi one-dimensional Ba_a2V_3O_9: chain segmentation versus the staggered field effect | null |
2003-03-01 | We study the ground state properties of a superconductor-ferromagnet-insulator trilayer on the basis of a Hubbard Model featuring exchange splitting in the ferromagnet and electron-electron attraction in the superconductor. We solve the spin-polarized Hartree-Fock-Gorkov equations together with the Maxwell's equation (... | Spin polarized current in the ground state of superconductor-ferromagnet-insulator trilayers | null |
2003-02-01 | We present calculations of the magnetoconductivity in a two-dimensional electron system including the Rashba spin-orbit interaction. Essential for these calculations is an extension of the self-consistent Born approximation which takes into account the electron spin degree of freedom. The calculated magnetoconductivity... | Magnetotransport Calculations for Two-Dimensional Electrons with Spin-Orbit Interaction | null |
2003-02-01 | Electronic band-structure of zinc-blende (zb) chromium monopnictides, CrP, CrAs, and CrSb, as well as chalcopyrite-type CrGeP_2 is studied comparatively by using first-principles density-functional calculations. It is found that the ferromagnetic state is energetically favorable for all these materials. Both zb-CrAs an... | Materials Design of Cr-Based Half-Metallic Ferromagnets | null |
2003-02-01 | Excited states of ^99Ag were populated via the ^50Cr + ^58Ni (261 MeV) reaction using the NORDBALL detector array equipped with charged-particle and neutron detector systems for reaction channel separation. On the basis of the measured γγ-coincidence relations and angular distribution ratios a significantly extended le... | Maximally aligned states in ^99Ag | null |
2003-01-01 | Magnetic phenomena have their origins in a quantum mechanical description of electronic structure. An introduction to the quantum mechanical origins of magnetism has been given in an earlier chapter of this book. In particular, the exchange coupling between spins, which follows from the Coulomb interaction between the ... | Secondary Magnetic Properties | null |
2003-01-01 | Magnetism in ionic compounds has been investigated from the earliest decades of the twentieth century, culminating during the middle years with a plethora of research results from a variety of academic, government, and industrial laboratories. Motivation behind these efforts came mainly from two directions: microwave s... | Electron Spins in Ionic Molecular Structures | null |
2003-01-01 | A review is given of the unconventional superconductivity of Sr_2Ru0_4 and the magnetic properties of Ca_2- x Sr_xRuO_4 The electronic properties are determined by the three 4 d - t 2 _g-electrons of Ru. It is shown that superconductivity is due to the d _xy-electrons, while the magnetic behavior is more likely a featu... | Ruthenates: Unconventional Superconductivity and Magnetic Properties | null |
2003-01-01 | Residual dipolar couplings (RDCs) observed between nuclear spins in molecules in partially oriented media have become a valuable source of information for NMR spectroscopists seeking to structurally characterize biological macromolecules. Examination of the form of the direct ( D ) and indirect ( J ) nuclear spin-spin ... | Evaluation of the influence of anisotropic indirect nuclear spin-spin coupling tensors on effective residual dipolar couplings for model peptides | null |
2003-01-01 | The electronic structure of the dimeric iron complex [Fe_2(bbpo)Cl_4]^ n − with the tetranionic ligand 1,2-bis(3,5-di- tert -butyl-2-hydroxyphenyl)oxamide was studied in two different oxidation states. Combined Mössbauer and EPR investigations in conjunction with magnetic susceptibility measurements are used to demonst... | Electronic and Molecular Structure Studies of a (Bio)Inorganic Complex — A Multi-Technique Approach | null |
2003-01-01 | Spin degeneracy of electron and hole states in a semiconductor is the combined effect of inversion symmetry in space and time.The chapter starts with some general remarks on B = 0 spin splitting. Then BIA spin splitting in zinc blende semiconductors is discussed followed by a detailed discussion of SIA spin splitting i... | Inversion-Asymmetry-Induced Spin Splitting | null |
2003-01-01 | In the present work we are interested in quantum structures made of direct semiconductors with an inversion-asymmetric zinc blende structure. All important semiconductors in this category, such as GaAs, InSb, and CdTe, have qualitatively a very similar band structure with the smallest gap between the valence and conduc... | The Extended Kane Model | null |
2003-01-01 | Appendix: Notation and Symbols | Notation and Symbols | null |
2003-01-01 | Two new microscopic models for the appearance of heavy quasiparticles have been recently suggested. They concern UPt_3 and LiV_2O_4 and are based on a partial localization of 5 f electrons and on geometrical frustrations, respectively. | Origins of Heavy Quasiparticles | null |
2003-01-01 | The spin-galvanic effect and the spin polarization induced circular photogalvanic effect generated by homogeneous optical excitation with circularly polarized radiation in quantum wells (QWs) are reviewed. In both effects the current flow is driven by an asymmetric distribution of spin polarized carriers in k -space of... | Spin-Galvanic Effect and Spin Orientation Induced Circular Photogalvanic Effect in Quantum Well Structures | null |
2003-01-01 | Recent shell model calculations for the neutron-rich nuclei around the magic numbers N = 20, N = 28 and N = 40 are reviewed. We stress two points: i) The crucial role played by the monopole part of the effective interaction that determines the evolution of the spherical mean field. In particular, the reduction in the q... | Large-scale shell model calculations for exotic nuclei | null |
2003-01-01 | Besides mass and charge, electrons also possess a spin. By detecting the direction of the spin of photoemitted electrons one can gain important information about the photoexcitation process and the properties of the sample under investigation. There are two modes in which a PE experiment can produce a spin polarization... | Spin-Polarized Photoelectron Spectroscopy | null |
2003-01-01 | The low-temperature electronic transport properties of sub-micrometer sized quantum dots, coupled to leads via tunnel barriers [1], are among the most promising areas of present-day research in mesoscopic physics [2, 3]. In particular, the interest of numerous research groups is focused on spin effects in quantum dots.... | Spin Blockades in the Transport through Quantum Dots | null |
2003-01-01 | A high-pressure Mössbauer spectroscopic study of [^57Fe(PPIX)OH] is reported under conditions where the pressure is increased and then released. Data were recorded over the pressure range from room pressure to 7.1 GPa using a modified Merril-Bassett Diamond Anvil cell. [^57Fe(PPIX)OH] exhibits an asymmetric quadrupole ... | An Interesting Spin-State Transition for [Fe(PPIX)OH] Induced by High Pressure in a Diamond Anvil Cell | null |
2003-01-01 | The Genesis Ion Monitor (GIM) and the Genesis Electron Monitor (GEM) provide 3- dimensional plasma measurements of the solar wind for the Genesis mission. These measurements are used onboard to determine the type of plasma that is flowing past the spacecraft and to configure the solar wind sample collection subsystems ... | The Plasma Ion and Electron Instruments for the Genesis Mission | null |
2003-01-01 | In the present review, we reexamine the photomagnetic properties of the [Fe( PM - BiA )_2(NCS)_2], cis -bis(thiocyanato)-bis[( N -2′-pyridylmethylene)-4-(aminobiphenyl)]iron(II), compound which exhibits, depending on the synthetic method, an exceptionally abrupt spin transition ( phase I ) with a very narrow hysteresi... | Spin Crossover Properties of the [Fe(PM-BiA)_2(NCS)_2] Complex – Phases I and II
| null |
2003-01-01 | In the present review, we reexamine the photomagnetic properties of the [Fe( PMBiA )_2(NCS)_2], cis -bis(thiocyanato)-bis[( N -2′-pyridylmethylene)-4-(aminobiphenyl)]iron(II),compound which exhibits, depending on the synthetic method, an exceptionally abrupt spin transition ( phase I ) with a very narrow hysteresis ( T... | Spin Crossover Properties of the [Fe(PM-BiA)_2(NCS)_2] Complex — Phases I and II
| null |
2003-01-01 | The flavor structure of the nucleon as revealed in parton distributions (PDF’s) is central to understanding the partonic structure of the nucleon. Recent data on unpolarized PDF’s and their implications for the flavor- dependent quark helicity distributions are discussed. Results are presented for spin asymmetries in i... | Flavor Structure of the Nucleon as Revealed at HERMES | null |
2003-01-01 | Group theory has developed so much in recent years that a separate volume would be needed even for an introduction to all the main areas of research. The most a chapter can do is to give the reader a taste by a selection of topics; our choice was made on the basis of general importance or interest, and relevance in lat... | Further Group Theory | null |
2003-01-01 | In classical physics, amazing consequences do not flow from the assumption that the constituents of a system are indistinguishable. If the constituents in question are particles with identical masses and charges, then the Hamiltonian is invariant under the interchange of the coordinates and momenta belonging to any pai... | Systems of Identical Particles | null |
2002-12-01 | The electronic structure of the dimeric iron complex [Fe_2(bbpo)Cl_4]^ n − with the tetranionic ligand 1,2-bis(3,5-di- tert -butyl-2-hydroxyphenyl)oxamide was studied in two different oxidation states. Combined Mössbauer and EPR investigations in conjunction with magnetic susceptibility measurements are used to demonst... | Electronic and Molecular Structure Studies of a (Bio)Inorganic Complex – A Multi-Technique Approach | null |
2002-12-01 | The electron spin resonance (ESR) measurements were performed in single crystals of La_1 − x Sr_ x MnO_3 (0.05 ≤ x ≤ 0.125) in order to study the interplay of crystal field, Dzyaloshinsky–Moriya interaction, Jahn–Teller (JT) effect, and orbital order. The angular dependence of the ESR linewidth of an untwinned La_0.95S... | Microscopic State of Low Doped Manganites La_1 − xSr_xMnO_3 Probed by ESR | null |
2002-12-01 | Electron spin resonance in semimagnetic Cd_1− x Mn_xTe (0< x <0.7) and Zn_1− x Mn_xTe (0< x <0.53) compounds was studied at temperatures of 77 and 300 K. It is found that two types of paramagnetic centers exist in Zn_1− x Mn_xTe, one of which is related to Mn^2+ ions and the other is attributed to structural defects in... | Electron spin resonance in Cd_1−x
Mn_xTe and Zn_1−x
Mn_xTe compounds | null |
2002-11-01 | We give a detailed picture of the mesoscopic conductance fluctuations in the deep insulating regime (DIR) within the Nguyen, Spivak and Shklovskii model in the unitary and symplectic ensembles. Slutski's theorem is invoked to rigorously state the ergodic problem for conductance fluctuations in the DIR, in contrast with... | Persistent non-ergodic fluctuations in mesoscopic insulators: The NSS model in the unitary and symplectic ensembles | null |
2002-10-01 | A model of a degenerate gas consisting of neutrons that are in chemical equilibrium with degenerate protons and electrons in a stationary and homogeneous superstrong magnetic field is used to describe the state of the matter in central regions of strongly magnetized neutron stars. Expressions for thermodynamic quantiti... | Quantum Macroscopic Effects in a Degenerate Strongly Magnetized Nucleon Gas | null |
2002-08-01 | In this article we study the impact of the spin-orbit interaction on the electron quantum confinement for narrow gap semiconductor quantum dots. The model formulation includes: (1) the effective one-band Hamiltonian approximation; (2) the position- and energy-dependent quasi-particle effective mass approximation; (3) t... | Electron energy state spin-splitting in 3D cylindrical semiconductor quantum dots | null |
2002-07-01 | The Rashba effect resonant tunneling diode is a candidate for achieving spin polarizing under zero magnetic field using only conventional non-magnetic III–V semiconductor heterostructures. We point out the challenges involved based on simple arguments, and offer strategies for overcoming these difficulties. We present ... | Modeling Spin-Dependent Transport in InAs/GaSb/AlSb Resonant Tunneling Structures | null |
2002-02-01 | We show that in the metallic phase of a two dimensional electron gas the spin-orbit coupling due to structure inversion asymmetry leads to a characteristic anisotropy in the magnetoconductance. Within the assumption that the metallic phase can be described by a Fermi liquid, we compute the conductivity in the presence ... | Magnetoconductance of a two-dimensional metal in the presence of spin-orbit coupling | null |
2002-02-01 | Adsorption of CO onto dehydrated cobalt-exchanged ZSM-5 zeolite was studied by CW-EPR techniques. It is shown that the reversible formation of a low spin carbonyl η^1{Co(CO)_ n }^7 adduct upon addition of carbon monoxide at p _CO>50–60 Torr involves significant change in the spin state of Co^2+ from S=3/2 to 1/2. The s... | EPR Study of CO Adsorption onto CoZSM-5 Zeolite: Evidence for Spin Crossover upon Coordination and |z^2, ^2A1〉 Ground State | null |
2002-01-01 | In this contribution we discuss the origin of the intriguing non-magnetic ground state observed in LaCoO_3. We show that the non-magnetic state of the Co^3+ ion can be understood within the Quantum Atomistic Solid-State theory (QUASST) and is caused by the off-cubic distortion of the local crystal field related to the ... | Disappearance of the Co magnetic moment in LaCoO_3
| null |
2002-01-01 | Many III-V semiconductor alloys A_xB_1-xC exhibit spontaneous CuPt-like ordering when grown from the vapor phase. This article describes theoretically the ordering induced changes in the structural, electronical, and optical properties of the semiconductor alloys as a function of the long range order parameter η. These... | Effects of Ordering on Physical Properties of Semiconductor Alloys | null |
2002-01-01 | In the framework of the Dirac phenomenology it is shown that the pseudo-spin symmetry breaking term is not perturbative. The self-consistent effects are important for generating the total pseudo spin-orbit splitting (PSOS). The total PSOS is determined by the general structure of the Dirac equation through a delicate c... | The Pseudospin Symmetry in Finite Nuclei: Dirac Phenomenology | null |
2002-01-01 | Electronic and Mechanical Properties of Carbon Nanotubes | null | |
2002-01-01 | Extensive data and references are available online through the Internet [1]. A comprehensive, critically evaluated database, whose address is given below, is maintained by the National Institute of Standards and Technology (NIST). Files of special relevance to atomic spectroscopy are the Atomic Spectroscopic Database b... | Spectra | null |
2002-01-01 | The investigation of (e, 2e) processes on atoms by spin-polarized electron offers a sensitive tool for stringent test of theories by probing different physical mechanisms like exchange scattering, spin-orbit coupling of both bound and continuum states, orbital orientation and alignment etc as well as their interplay. R... | Longitudinal Spin Asymmetry in (e, 2e) Processes on Atoms by Relativistic Electrons | null |
2002-01-01 | Consider steady state current flow in the circuit depicted in Fig. 7.1 [1], where two identical strong ferromagnetic layers (F_1 and F_2) are arranged with a distance on a thin nonmagnetic metal (N) layer. If F_i (i = 1, 2) is uniformly magnetized and the magnetization M _i is strongly oriented, it is a property of F t... | Other GMR Devices | null |
2002-01-01 | It is well known that in condensed matter physics no single-particle theory can provide us with an exact description of the real experiment due to a huge number of interacting particles involved in the process. However, the main goal for the theory is to catch the basic unusual idea, which would give a clear physical p... | Magneto-Optics of Composite Fermions and Skyrmions | null |
2002-01-01 | The Mystery of Nucleon Spin | null | |
2002-01-01 | Multiparticle Systems | null | |
2001-12-01 | High magnetic-field electron paramagnetic resonance (HFEPR) has been extensively applied to the study of photosynthetic reaction centers. HFEPR experiments have provided accurate measurements of g -values of radicals in photosystems I and II. The g -values not only reflect the structure of the radical, but also its imm... | A high-field EPR tour of radicals in photosystems I and II | null |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.