论文标题
近表面量子井中的磁磁反省弱抗钙化
Magneto-anisotropic weak antilocalization in near-surface quantum wells
论文作者
论文摘要
我们研究了平面磁场对缺乏散装和反转对称性的近地面量子井的弱抗静电特征的影响。测得的磁导率相对于平面磁场的方向表现出强各向异性。观察到的磁肛门反相的两倍对称性源自Rashba和Dresselhaus旋转轨道耦合之间的竞争。弱抗静电对由Zeeman和自旋轨道田间产生的自旋纹理的高灵敏度导致较高的各向异性比率，达到100％。使用半经典通用模型与实验数据进行定量一致，我们独特地确定了Dresselhaus和Rashba参数的值以及电子的有效平面内G因子。了解这些参数为从Spintronics到拓扑量子计算的新型应用提供了新的前景。
We investigate the effects of an in-plane magnetic field on the weak antilocalization signature of near-surface quantum wells lacking bulk and inversion symmetry. The measured magnetoconductivity exhibits a strong anisotropy with respect to the direction of the in-plane magnetic field. The two-fold symmetry of the observed magneto-anisotropy originates from the competition between Rashba and Dresselhaus spin-orbit couplings. The high sensitivity of the weak antilocalization to the spin texture produced by the combined Zeeman and spin-orbit fields results in very large anisotropy ratios, reaching 100%. Using a semiclassical universal model in quantitative agreement with the experimental data, we uniquely determine the values of the Dresselhaus and Rashba parameters as well as the effective in-plane g-factor of the electrons. Understanding these parameters provides new prospects for novel applications ranging from spintronics to topological quantum computing.
