4.8 Article

Band splitting with vanishing spin polarizations in noncentrosymmetric crystals

期刊

NATURE COMMUNICATIONS
卷 10, 期 -, 页码 -

出版社

NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-019-13197-z

关键词

-

资金

  1. NSFC [11825403]
  2. Special Funds for Major State Basic Research [2015CB921700]
  3. Program for Professor of Special Appointment (Eastern Scholar)
  4. Qing Nian Ba Jian Program
  5. Fok Ying Tung Education Foundation

向作者/读者索取更多资源

The Dresselhaus and Rashba effects are well-known phenomena in solid-state physics, in which spin-orbit coupling splits spin-up and spin-down energy bands of nonmagnetic non-centrosymmetric crystals. Here, we discuss a phenomenon we dub band splitting with vanishing spin polarizations (BSVSP), in which, as usual, spin-orbit coupling splits the energy bands in nonmagnetic non-centrosymmetric systems. Surprisingly, however, both split bands show no net spin polarization along certain high-symmetry lines in the Brillouin zone. In order to rationalize this phenomenon, we propose a classification of point groups into pseudo-polar and non-pseudo-polar groups. By means of first-principles simulations, we demonstrate that BSVSP can take place in both symmorphic (e.g., bulk GaAs) and non-symmorphic systems (e.g., two dimensional ferroelectric SnTe). Furthermore, we identify a linear magnetoelectric coupling in reciprocal space, which could be employed to tune the spin polarization with an external electric field. The BSVSP effect and its manipulation could therefore form the basis for future spintronic devices.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.8
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据