科研之友
微信
新浪微博
Facebook
分享链接
摘要
We present a simple model of Majorana fermions on a square lattice, and study zero-energy states due to Z(2) vortices. We show the relationship between the Chern number of the ground state and the number of zero-energy states through numerical calculations for finite systems. We also discuss the same relationship for the bulk system by observing the change in the spectral asymmetry as well as the lattice index.
- 出版日期2011-12
