Sign-reversible valley-dependent Berry phase effects in 2D valley-half-semiconductors

  title={Sign-reversible valley-dependent Berry phase effects in 2D valley-half-semiconductors},
  author={Xiaodong Zhou and Run-wu Zhang and Zeying Zhang and Wanxiang Feng and Yuriy Mokrousov and Yugui Yao},
  journal={npj Computational Materials},
Manipulating valley-dependent Berry phase effects provides remarkable opportunities for both fundamental research and practical applications. Here, by referring to effective model analysis, we propose a general scheme for realizing topological magneto-valley phase transitions. More importantly, by using valley-half-semiconducting VSi 2 N 4 as an outstanding example, we investigate sign change of valley-dependent Berry phase effects which drive the change-in-sign valley anomalous transport… 
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