论文标题
动态的rashba-dresselhaus效应
Dynamic Rashba-Dresselhaus Effect
论文作者
论文摘要
Rashba-dresselhaus效应是半导体中双重归化带极值的分裂，伴随着反旋转的旋转纹理和自旋摩托锁的出现。在这里，我们研究了如何通过晶格振动来改变这种效果。我们表明，在中心对称的非磁性晶体中，对对称性的散装rashba-dresselhaus效应是对称效应的，电子 - phonon的相互作用可以诱导响声辅助，动态的Rashba-dresselhaus旋转，并在存在超平衡语音人群的情况下进行。特别是，我们展示了Rashba，Dresselhaus或Weyl自旋纹理如何通过驱动相干激活的语音子选择性地建立，并且我们进行了从头算的计算，以量化Halide Perovskites的这种效果。
The Rashba-Dresselhaus effect is the splitting of doubly degenerate band extrema in semiconductors, accompanied by the emergence of counter-rotating spin textures and spin-momentum locking. Here we investigate how this effect is modified by lattice vibrations. We show that, in centrosymmetric non-magnetic crystals, for which a bulk Rashba-Dresselhaus effect is symmetry-forbidden, electron-phonon interactions can induce a phonon-assisted, dynamic Rashba-Dresselhaus spin splitting in the presence of an out-of-equilibrium phonon population. In particular, we show how Rashba, Dresselhaus, or Weyl spin textures can selectively be established by driving coherent infrared-active phonons, and we perform ab initio calculations to quantify this effect for halide perovskites.
