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Quasiparticles and Polaronic Effects in Crystals, Fermi Gasses and Fermi Liquids
Springer Science and Business Media LLC - Tập 23 - Trang 693-707 - 2010
We consider the formation of polarons in three different situations: (1) the formation of a polaron in the crystal due to the electron-phonon interaction, (2) the formation of a polaron in the presence of a quiescent Fermi sea, and the (3) the formation of polarons in an interacting Fermi gas, and Fermi liquids, including charge and spin polarization or magnetic polarization. We develop the pertur...... hiện toàn bộ
Formation and Magnetic Interaction of Si/MnGe Core/Shell Nanowire Arrays
Springer Science and Business Media LLC - Tập 33 - Trang 3929-3935 - 2020
We present the preparation of MnGe coated Si nanowires (NWs) using molecular beam epitaxy. Uniformly dispersed silicon NW surfaces were initially covered by Ge, and then Si/MnGe core/shell NW heterostructures were fabricated by solid phase epitaxial growth. Morphology and the magnetic properties of the Si/MnGe core/shell NWs were investigated. The results of scanning electron microscope and transm...... hiện toàn bộ
Field and temperature dependence of the current-voltage characteristics of Bi2Sr2Ca2Cu3O10/Ag multifilamentary tapes
Springer Science and Business Media LLC - Tập 10 - Trang 215-219 - 1997
The current-voltage characteristics of Bi2Sr2Ca2Cu3O10/Ag multifilamentary tapes were measured at different temperatures close to the critical temperature and in different applied magnetic fields up to 1000 Oe. The data were interpreted in terms of thermally activated flux creep by using an intermediate phenomenological model that takes into account the collective pinning. Temperature and field de...... hiện toàn bộ
Specific Heat Jump at Tc of High Tc Superconductors: Effect of Van Hove Singularity
Springer Science and Business Media LLC - Tập 13 - Trang 41-46 - 2000
In the BCS framework, exact expressions for the ratio between the jump in the specific heat at T
c
and the normal phase specific heat are derived within the Van Hove singularity scenario. Analytical results are obtained for an isotropic s-wave and anisotropic d-wave pairing symmetries. Graphical solutions of the ratio as functions of ω
D
...... hiện toàn bộ
Diffusion Tensor for Spin Polarization Transport on Rare Nuclei
Springer Science and Business Media LLC - Tập 20 - Trang 175-178 - 2006
Migration process of spin polarization over disordered system of impurity nuclei is considered. The long time asymptotics of the process is investigated on the basis of a new numerical simulation method, which includes periodic continuation of the system without periodic continuation of the initial condition. It is shown that the long time asymptotics has a diffusive character. The concentration d...... hiện toàn bộ
Prediction of a Dynamically Stable New Half-Metallic Phase for the BaN and BaC Compounds
Springer Science and Business Media LLC - Tập 32 - Trang 2031-2044 - 2018
The structural, magnetic, elastic, mechanical, and thermodynamic properties of BaC and BaN compounds in different phases were studied using first-principle calculations based on spin-polarized density functional theory within the generalized gradient approximation (GGA-PBEsol) and the modified Becke–Johnson approach (mBJ-GGA-PBEsol) for the exchange-correlation energy and potential. The following ...... hiện toàn bộ
Spontaneous Appearance of the Spin-Triplet Fulde-Ferrell-Larkin-Ovchinnikov Phase in a Two-Band Model: Possible Application to LaFeAsO 1−x F x
Springer Science and Business Media LLC - Tập 28 - Trang 1155-1160 - 2014
The possibility of a spontaneous spin-triplet paired phase of the Fulde-Ferrell-Larkin-Ovchinnikov type is studied. As it is shown in a system with the dominant interband pairing and two distinct Fermi surface sheets, the Fermi wave-vector mismatch can be compensated by a nonzero center-of-mass momentum of the Cooper pairs. This idea is examined with the use of a model which describes the two hole...... hiện toàn bộ
Synthesis, Structure, and Properties of a Copper Bromide Coordination Compound with 3-Amino-4-EthoxyCarbonylPyrazole. Nature of the Nonresonant and Ferromagnetic Absorption Observed by EPR
Springer Science and Business Media LLC - Tập 28 - Trang 1007-1011 - 2014
Synthesis, structure, and magnetic properties of copper bromide CuL2Br2 with 3-amino-4-ethoxycarbonylpyrazole (L) are presented. The CuL2Br2 is a 1D polymer complex and crystal structure has triclinic symmetry with space group P-1. The examined compound has thermochromic properties (russet ↔ light red), and its magnetic properties are changed from paramagnetic to nonresonance and ferromagnetic one...... hiện toàn bộ
Giant Magnetoresistance Effect in the Square Networks with Regular Impurities
Springer Science and Business Media LLC - Tập 36 - Trang 229-235 - 2022
The magnetoresistance due to the disorder in the inhomogeneous systems can be studied using the classical model of resistor networks. In this work, the magnetoresistance of an inhomogeneous lattice is simulated using this model. The inhomogeneous network consists of two materials with different resistivity. Maxwell’s equations have been solved for a four-terminal resistor unit first, and then the ...... hiện toàn bộ
Lý thuyết về Siêu dẫn Nhiệt độ Cao d-Wave trong các Cuprate Liên quan đến Các Chế độ Lattice Phi tuyến Dịch bởi AI
Springer Science and Business Media LLC - Tập 30 - Trang 3377-3395 - 2017
Cơ chế chuyển tiếp trong các siêu dẫn cuprate nhiệt độ cao là một câu đố nổi bật. Một đề xuất trước đó về vai trò của các chế độ không tuyến tính trong sự không ổn định của mạng lưới đối với cơ chế kết đôi vi mô trong các siêu dẫn cuprate nhiệt độ cao (Lee, J. Supercond. Nov. Magn. 23(3), 333; 2009) được xem xét lại để cung cấp một cơ chế khả thi cho siêu dẫn trong các cuprate này thông qua một da...... hiện toàn bộ
#siêu dẫn #nhiệt độ cao #cuprate #chế độ lattice phi tuyến #EHM #đối xứng d-wave
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