Spin-orbit coupling effects in spin manipulation and transport control

该项目在自旋干涉测量领域取得了突出成果。在Rashba和Dresselhaus自旋轨道相互作用的存在下，通过自旋干涉仪的运输相对于探测面内磁场方向是各向异性的。我们表明，这可以用来检测Dresselhaus相互作用的符号的反转。首先，初步结果发表讨论各向异性在一个固定的Dresselhaus相互作用和变量Rashbaspin轨道场。结果表明，振荡各向异性由于自旋旋转动力学的布洛赫球。结果已经公布。随后，我们讨论了在InGaAs为基础的自旋干涉仪的实验结果，并在固定的Dresselhaus相互作用的数值数据的结果进行比较。我们发现了一个额外的过渡的各向异性的迹象，这是一致的Dresselhaus自旋轨道相互作用的逆转，由于在样品中的应变。因此，该项目实现了一个显着的目标，因为我们表明，自旋轨道场可以探测使用自旋干涉术，我们是第一个检测到实验符号变化的Dresselhaus相互作用。这些结果正在接受同行审查。我们还发表了另外两篇论文，我们讨论了自旋共振的几何相位的拓扑转变。这些结果类似于在环形干涉仪中发现的结果。在主办机构的合同结束后，由于失去了Kakenhi资格，该项目被提前终止。因此，所有计划的目标都无法实现。

The project achieved outstanding results in the field of spin interferometry. In the presence of both Rashba and Dresselhaus spin-orbit interaction transport through a spin-interferometer is anisotropic with respect to a probing in-plane magnetic field direction. We showed that this can be used to detect reversal of the sign of the Dresselhaus interaction. First, initial results were published discussing anisotropies in a fixed Dresselhaus interaction and variable Rashbaspin-orbit field. The results indicated oscillating anisotropy due to spinrotation dynamics on the Bloch sphere. The results have been published. Subsequently, we discussed experimental results in a InGaAs based spin-interferometer and compared results to numerical data at fixed Dresselhaus interaction. We found an extra transition in the sign of anisotropy that was consistent with reversal of the Dresselhaus spin-orbit interaction due to strain in the sample. Therefore the project achieved a remarkable goal as we showed that the spin-orbit fields canbe probed using spin interferometry and we were first to detect experimentally sign change of the Dresselhaus interaction. These results are under peer-review. We published also two other papers where we discuss topological transitions of the geometric phase in spin resonance. These results are analogous to those found in ring interferometers. The project was prematurely terminated due to loss of Kakenhi eligibility after the contract at the host institution ended. Therefore all the planned goals could not be achieved.