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Intrinsic and extrinsic spin Hall effects are considered together on an equal theoretical footing for the Rashba spin-orbit coupling in two-dimensional (2D) electron and hole systems, using the diagrammatic method for calculating the spin…

介观与纳米尺度物理 · 物理学 2009-11-11 Wang-Kong Tse , S. Das Sarma

Since the seminal works in the fifties it has been known that a bath of non-interacting electrons mediates an interaction between local moments (such as nuclear spins or magnetic impurities) coupled to distant sites of the lattice. Recent…

介观与纳米尺度物理 · 物理学 2024-08-07 Szczepan Głodzik , Rok Žitko

The nature of the effective spin Hamiltonian and magnetic order in the honeycomb iridates is explored by considering a trigonal crystal field effect and spin-orbit coupling. Starting from a Hubbard model, an effective spin Hamiltonian is…

强关联电子 · 物理学 2012-07-10 Subhro Bhattacharjee , Sung-Sik Lee , Yong Baek Kim

Solutions of the Schr\"odinger equation are obtained for an electron in a two-dimensional circular semiconductor quantum ring in the presence of both external uniform constant magnetic field and the Rashba and Dresselhaus spin-orbit…

数学物理 · 物理学 2012-12-21 V. V. Kudryashov , A. V. Baran

We describe a new effect in semiconductor spintronics that leads to dissipationless spin-currents in paramagnetic spin-orbit coupled systems. We argue that in a high mobility two-dimensional electron system with substantial Rashba…

介观与纳米尺度物理 · 物理学 2009-11-10 Jairo Sinova , Dimitrie Culcer , Q. Niu , N. A. Sinitsyn , T. Jungwirth , A. H. MacDonald

We propose a mechanism of spin Hall effect in two-dimensional electron gas with spatially random Rashba spin-orbit interaction. The calculations based on the Kubo formalism and kinetic equation show that in contrast to the constant…

介观与纳米尺度物理 · 物理学 2015-05-20 V. K. Dugaev , M. Inglot , E. Ya. Sherman , J. Barnas

Spin-orbit coupling is relatively weak for electrons in bulk silicon, but enhanced interactions are reported in nanostructures such as the quantum dots used for spin qubits. These interactions have been attributed to various dissimilar…

We make detailed analysis of each possible spin-orbit coupling of zincblende narrow-gap cylindrical quantum dots built in two-dimensional electron gas. These couplings are related to both bulk (Dresselhaus) and structure (Rashba) inversion…

原子物理 · 物理学 2007-05-23 C. F. Destefani , S. E. Ulloa , G. E. Marques

We present a theoretical study of diluted magnetic semiconductors that includes spin-orbit coupling within a realistic host band structure and treats explicitly the effects of disorder due to randomly substituted Mn ions. While spin-orbit…

无序系统与神经网络 · 物理学 2009-11-13 Byounghak Lee , Xavier Cartoixa , Nandini Trivedi , Richard M. Martin

We study theoretically the ultrafast spin dynamics of II-VI diluted magnetic semiconductors in the presence of spin-orbit interaction. Our goal is to explore the interplay or competition between the exchange $sd$-coupling and the spin-orbit…

介观与纳米尺度物理 · 物理学 2015-05-14 Florian Ungar , Moritz Cygorek , Pablo I. Tamborenea , Vollrath Martin Axt

Starting from a microscopic tight-binding model and using second order perturbation theory, we derive explicit expressions for the intrinsic and Rashba spin-orbit interaction induced gaps in the Dirac-like low-energy band structure of an…

介观与纳米尺度物理 · 物理学 2009-11-11 Hongki Min , J. E. Hill , N. A. Sinitsyn , B. R. Sahu , Leonard Kleinman , A. H. MacDonald

Recently, we have found an additional spin-orbit (SO) interaction in quantum wells with two subbands [Phys. Rev. Lett. 99, 076603 (2007)]. This new SO term is non-zero even in symmetric geometries, as it arises from the intersubband…

介观与纳米尺度物理 · 物理学 2008-10-20 Rafael S. Calsaverini , Esmerindo Bernardes , J. Carlos Egues , Daniel Loss

Electronic bound states around charged impurities in two-dimensional systems with structural inversion asymmetry can be described in terms of a two-dimensional hydrogen atom in the presence of a Rashba spin-orbit interaction. Here, the…

介观与纳米尺度物理 · 物理学 2009-11-13 C. Grimaldi

We introduce an analytical approximation scheme to diagonalize parabolically confined two dimensional electron systems with both the Rashba and Dresselhaus spin-orbit interactions. The starting point of our perturbative expansion is a…

介观与纳米尺度物理 · 物理学 2014-04-07 Sigurdur I. Erlingsson , J. Carlos Egues , Daniel Loss

Non-magnetic impurities affect the paramagnetic response of superconductors via the associated spin-orbit interaction which, when the non-magnetic impurity is close to the unitary limit, must be treated beyond the classical Born…

超导电性 · 物理学 2009-11-07 C. Grimaldi

The presence of spin-orbit coupling or non-collinear magnetic spin states can have dramatic effects on the ground-state and spectral properties of materials, in particular on the band structure. Here, we develop non-collinear…

材料科学 · 物理学 2024-07-24 Antimo Marrazzo , Nicola Colonna

We have developed a method to systematically compute the form of Rashba- and Dresselhaus-like contributions to the spin Hamiltonian of heterostructures to an arbitrary order in the wavevector k. This is achieved by using the double group…

介观与纳米尺度物理 · 物理学 2009-11-11 X. Cartoixa , L. -W. Wang , D. Z. -Y. Ting , Y. -C. Chang

We present a new model for the study of spin-orbit coupling in interacting quasi-one-dimensional systems and solve it exactly to find the spectral properties of such systems. We show that the combination of spin-orbit coupling and…

介观与纳米尺度物理 · 物理学 2009-10-31 A. V. Moroz , K. V. Samokhin , C. H. W. Barnes

We calculate the anomalous Hall conductance of superconductors with spin-orbit interaction and with either uniform or local magnetization. In the first case we consider a uniform ferromagnetic ordering in a spin triplet superconductor,…

超导电性 · 物理学 2015-06-03 P. D. Sacramento , M. A. N. Araujo , V. R. Vieira , V. K. Dugaev , J. Barnas

Quantum states induced by single-atomic impurities are at the frontier of physics and material science. While such states have been reported in high-temperature superconductors and dilute magnetic semiconductors, they are unexplored in…