The asymmetric spin-orbit (SO) interactions play a crucial role in realizing topological phases in noncentrosymmetric superconductor (NCS).We investigate the edge states and the vortex core states in s-wave NCS with Rashba and Dresselhaus (110) SO couplings by both numerical and analytical methods. In particular, we demonstrate that there exists a novel semimetal phase characterized by the flat Andreev bound states in the phase diagram of the s-wave Dresselhaus NCS which supports the emergence of Majorana fermion (MF). The flat dispersion implies a peak in the density of states which has a clear experimental signature in the tunneling conductance measurements and the MFs proposed here should be experimentally detectable.
The Rashba and Dresselhaus types of spin-orbit coupling are two typical linear coupling forms. We establish the fundamental physics of a model which can be viewed as the double version of the Rashba and Dresselhaus spin-orbit coupling. This model describes the low energy physics of a class of massless Dirac fermions in spin-orbit systems. The physical properties of the massless Dirac fermions are determined by the mathematical relations of spin-orbit coefficients. For equal Rashba and Dresselhauss coupling constants, k-independent eigenspinors and a persistent spin helix combined with massless…
Anisotropic universal conductance fluctuations in disordered quantum wires with Rashba and Dresselhaus spin-orbit interaction and applied in-plane magnetic field
Effective Dresselhaus and Rashba spin-orbit interactions in narrow quantum wells
Rashba和线性Dresselhaus相互作用被认为对基于A $_3$ B $_5$化合物的量子阱中的二维电子的自旋分裂产生主要贡献。我们发现，界面的自旋轨道相互作用显着重整化相应的Rashba（$α_{SIA}$）和Dresselhaus（$α_{BIA}$）参数的值。为此，我们解决了有效质量方程的量子阱中补充的原始边界条件的原子尖锐的接口和计算界面的贡献$α_{SIA}$和$α_{BIA}$。我们的结果解释了相当大的传播在GaAs/AlGaAs量子阱的自旋轨道参数的实验数据。我们还证明了即使在平均电场为零的量子阱中，界面的非等效性也会导致自旋分裂的各向异性。
We theoretically consider spin pumping in a junction between a ferromagnetic insulator (FI) and a two-dimensional electron gas (2DEG) in which the Rashba and Dresselhaus spin-orbit interactions coexist. Using second-order perturbation theory, we derive an increase in linewidth in the case of an interfacial exchange coupling in a ferromagnetic resonance (FMR) experiment. We clarify how the enhancement of Gilbert damping depends on the resonant frequency and spin orientation of the FI. We show that this setup of an FMR experiment can provide information on the spin texture of 2DEG at the Fermi s…
Robustness of spin filtering against current leakage in a Rashba-Dresselhaus-Aharonov-Bohm interferometer
在早期的一篇论文[Phys. Rev. B 84，035323（2011）]中，我们提出了一种基于类金刚石干涉仪的自旋滤波器，该干涉仪同时受到Aharonov-Bohm通量和（Rashba和Dresselhaus）自旋轨道相互作用的影响。在这里，我们表明，出射电子自旋的全极化保持不变，即使当一个允许泄漏的电子从分支的干涉仪。一旦调谐其中一个分支上的栅极电压以实现它们之间的有效对称，则可以通过确定自旋-轨道相互作用强度和Aharonov-Bohm通量的电场和/或磁场来控制该极化。
Two-dimensional electron gas in the regime of strong light-matter coupling: Dynamical conductivity and all-optical measurements of Rashba and Dresselhaus coupling
Spin-orbit interaction in semiconductor structures with broken space inversion symmetry leads to spin splitting of electron and hole states even in the absence of magnetic field. We discover that, beyond the Rashba and Dresselhaus contributions, there is an additional type of the zero-field spin splitting which is caused by the interplay of the cubic shape of crystal unit cell and macroscopic structure asymmetry. In quantum wells grown along low-symmetry crystallographic axes, this type of spin-orbit interaction couples the out-of-plane component of carrier's spin with the in-plane momentum wh…
The Rashba-Dresselhaus effect is the splitting of doubly degenerate band extrema in semiconductors, accompanied by the emergence of counter-rotating spin textures and spin-momentum locking. Here we investigate how this effect is modified by lattice vibrations. We show that, in centrosymmetric non-magnetic crystals, for which a bulk Rashba-Dresselhaus effect is symmetry-forbidden, electron-phonon interactions can induce a phonon-assisted, dynamic Rashba-Dresselhaus spin splitting in the presence of an out-of-equilibrium phonon population. In particular, we show how Rashba, Dresselhaus, or Weyl …
Electrical control of phonon mediated spin relaxation rate in semiconductor quantum dots: the Rashba vs the Dresselhaus spin-orbit couplings
在对称量子点（QD）中，众所周知，自旋热点（即，尖点状结构，由于在能级或反交叉点附近存在简并性）对于纯Rashba情况存在，但对于纯Dresselhaus情况不存在[Phys.Rev.Lett. 95，076805（2005）]。由于Dresselhaus自旋轨道耦合在GaAs和GaSb量子点中占主导地位，因此即使对于纯Dresselhaus情况，也必须找到自旋热点或尖点结构的确切位置。在本文中，第一次，我们提出的分析和数值计算结果表明，自旋热点也可以看到纯Dresselhaus自旋轨道耦合的情况下，通过外部栅极诱导大的各向异性。在自旋热点处或附近，自旋跃迁速率提高，退相干时间比没有自旋热点的情况减少了几个数量级。因此，当设计用于量子逻辑门、固态量子计算和量子信息处理中的可能实现的基于QD自旋的晶体管时，应当避免这样的位置。也可以提取精确的实验数据（Phys. Rev. Lett. 100，046803（2008））从我们开发的理论模型中获得声子介导的自旋翻转速率。
In the presence of Rashba-Dresselhaus coupling, strong spin-orbit interactions in liquid crystal optical cavities result in a distinctive spin-split entangled dispersion. Spin coherence between such modes give rise to an optical persistent-spin-helix. In this letter, we introduce optical gain in such a system, by dispersing a molecular dye in a liquid-crystal microcavity. We demonstrate both lasing in the Rashba-Dresselhaus regime and the emergence of an optical persistent spin helix.
A major impediment towards realizing technologies based on the emerging principles of antiferromagnetic spintronics is the shortage of suitable materials. In this paper, we propose a design of polar|nonpolar heterostructures of perovskite oxides, where a single unit cell of SrIrO3 is sandwiched between a thin film of LaAlO3 and a substrate of SrTiO3. Our calculations within the framework of density-functional theory + Hubbard U + spin-orbit coupling reveal a two-dimensional conducting layer with electron and hole pockets at the interface, exhibiting a strong anisotropic Rashba-Dresselhaus effe…
Magnetic-field-driven topological transitions in non-centrally-symmetric energy spectrum of 2D electron gas with Rashba-Dresselhaus spin-orbit interaction
