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Dynamic Rashba-Dresselhaus Effect
Physical Review Letters ( IF 8.1 ) Pub Date : 2021-12-02 , DOI: 10.1103/physrevlett.127.237601
Martin Schlipf 1 , Feliciano Giustino 2, 3
Affiliation  

The Rashba-Dresselhaus effect is the splitting of doubly degenerate band extrema in semiconductors, accompanied by the emergence of counterrotating spin textures and spin-momentum locking. Here we investigate how this effect is modified by lattice vibrations. We show that, in centrosymmetric nonmagnetic 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.

中文翻译:

动态 Rashba-Dresselhaus 效应

Rashba-Dresselhaus 效应是半导体中双简并带极值的分裂,伴随着反向旋转纹理和自旋动量锁定的出现。在这里,我们研究了晶格振动如何改变这种效应。我们表明,在中心对称的非磁性晶体中,由于大量的 Rashba-Dresselhaus 效应是对称禁止的,电子 - 声子相互作用可以在存在不平衡声子的情况下诱导声子辅助的动态 Rashba-Dresselhaus 自旋分裂人口。特别是,我们展示了如何通过驱动相干红外活性声子来选择性地建立 Rashba、Dreselhaus 或 Weyl 自旋纹理,并且我们进行了从头计算来量化卤化物钙钛矿的这种效应。
更新日期:2021-12-02
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