Spin interferometry in anisotropic spin-orbit fields
Spin interferometry in anisotropic spin-orbit fields
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DOI：
10.1103/physrevb.97.125423
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发表时间：
2017-10
影响因子：
3.7
通讯作者：
H. Saarikoski;A. Reynoso;J. P. Baltan'as;D. Frustaglia;J. Nitta
中科院分区：
文献类型：
--
作者：
H. Saarikoski;A. Reynoso;J. P. Baltan'as;D. Frustaglia;J. Nitta
二维电子气（2DEG）中的电子自旋可以由自旋轨道（SO）场操纵，SO场来源于具有独立各向同性特征的Rashba或Dresselhaus相互作用。然而，它们一起产生各向异性的SO场，通过自旋干涉对量子输运产生影响。在这里，我们研究了模型介观环的输运性质的Rashba和Dresselhaus [001] SO耦合的存在下，一个额外的面内塞曼场作为探针。通过1D和2D量子输运模拟，我们表明，这种设置提出了各向异性的量子电阻作为塞曼场方向的函数。此外，各向异性阻力可以通过Rashba强度进行调整，直至将其对Zeeman场的响应反转。我们还发现，与几何相位切换相关联的场纹理中的拓扑过渡被印在各向异性图案中。我们的结论是，电阻各向异性测量可以揭示签名的SO纹理和自旋载流子的几何相位。
Electron spins in a two-dimensional electron gas (2DEG) can be manipulated by spin-orbit (SO) fields originating from either Rashba or Dresselhaus interactions with independent isotropic characteristics. Together, though, they produce anisotropic SO fields with consequences on quantum transport through spin interference. Here we study the transport properties of modelled mesoscopic rings subject to Rashba and Dresselhaus [001] SO couplings in the presence of an additional in-plane Zeeman field acting as a probe. By means of 1D and 2D quantum transport simulations we show that this setting presents anisotropies in the quantum resistance as a function of the Zeeman field direction. Moreover, the anisotropic resistance can be tuned by the Rashba strength up to the point to invert its response to the Zeeman field. We also find that a topological transition in the field texture that is associated with a geometric phase switching is imprinted in the anisotropy pattern. We conclude that resistance anisotropy measurements can reveal signatures of SO textures and geometric phases in spin carriers.