Silaev M, Virtanen P, Bergeret F S, Heikkilä T T
Low Temperature Laboratory, Department of Applied Physics, Aalto University, FI-00076 Aalto, Finland.
Department of Theoretical Physics, The Royal Institute of Technology, Stockholm SE-10691, Sweden.
Phys Rev Lett. 2015 Apr 24;114(16):167002. doi: 10.1103/PhysRevLett.114.167002. Epub 2015 Apr 23.
We describe far-from-equilibrium nonlocal transport in a diffusive superconducting wire with a Zeeman splitting, taking into account different spin relaxation mechanisms. We demonstrate that due to the Zeeman splitting, an injection of current in a superconducting wire creates spin accumulation that can only relax via thermalization. This effect leads to a long-range spin accumulation detectable in the nonlocal signal. Our model gives a qualitative explanation and provides accurate fits of recent experimental results in terms of realistic parameters.
我们描述了在具有塞曼分裂的扩散型超导线中的远离平衡非局部输运，同时考虑了不同的自旋弛豫机制。我们证明，由于塞曼分裂，在超导线中注入电流会产生只能通过热化弛豫的自旋积累。这种效应导致在非局部信号中可检测到的长程自旋积累。我们的模型给出了定性解释，并根据实际参数对最近的实验结果提供了精确拟合。
