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