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Spin interferometry in anisotropic spin-orbit fields
Physical Review B ( IF 3.7 ) Pub Date : 2018-03-21 00:00:00 , DOI: 10.1103/physrevb.97.125423 Henri Saarikoski , Andres A. Reynoso , José Pablo Baltanás , Diego Frustaglia , Junsaku Nitta
Physical Review B ( IF 3.7 ) Pub Date : 2018-03-21 00:00:00 , DOI: 10.1103/physrevb.97.125423 Henri Saarikoski , Andres A. Reynoso , José Pablo Baltanás , Diego Frustaglia , Junsaku Nitta
Electron spins in a two-dimensional electron gas 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 modeled 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 one- and two-dimensional 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.
中文翻译:
各向异性自旋轨道场中的自旋干涉测量
二维电子气中的电子自旋可通过源自具有独立各向同性特性的Rashba或Dresselhaus相互作用的自旋轨道(SO)场进行控制。但是,它们在一起会产生各向异性的SO场,并通过自旋干涉对量子传输产生影响。在这里,我们研究在存在额外的平面塞曼场作为探针的情况下,模型介观环在Rashba和Dresselhaus [001] SO耦合作用下的传输性质。通过一维和二维量子传输模拟,我们表明此设置呈现了作为Zeeman场方向的函数的量子电阻各向异性。此外,各向异性电阻可以通过拉什巴强度进行调整,直至反转其对塞曼场的响应。我们还发现,各向异性图案中印有与几何相位转换相关联的场纹理中的拓扑转换。我们得出的结论是,电阻各向异性测量可以揭示自旋载体中SO织构和几何相的特征。
更新日期:2018-03-21
中文翻译:
各向异性自旋轨道场中的自旋干涉测量
二维电子气中的电子自旋可通过源自具有独立各向同性特性的Rashba或Dresselhaus相互作用的自旋轨道(SO)场进行控制。但是,它们在一起会产生各向异性的SO场,并通过自旋干涉对量子传输产生影响。在这里,我们研究在存在额外的平面塞曼场作为探针的情况下,模型介观环在Rashba和Dresselhaus [001] SO耦合作用下的传输性质。通过一维和二维量子传输模拟,我们表明此设置呈现了作为Zeeman场方向的函数的量子电阻各向异性。此外,各向异性电阻可以通过拉什巴强度进行调整,直至反转其对塞曼场的响应。我们还发现,各向异性图案中印有与几何相位转换相关联的场纹理中的拓扑转换。我们得出的结论是,电阻各向异性测量可以揭示自旋载体中SO织构和几何相的特征。