Discrete vortex bound states with a van Hove singularity in the vicinity of the Fermi level  

作　　者：方德龙 崔云康 Delong Fang;Yunkang Cui(School of Mathematics and Physics,Nanjing Institute of Technology,Nanjing 211167,China)

机构地区：[1]School of Mathematics and Physics,Nanjing Institute of Technology,Nanjing 211167,China

出　　处：《Chinese Physics B》2023年第5期644-647,共4页中国物理B（英文版）

基　　金：the National Natural Science Foundation of China (Grant No. 11804154);the Scientific Research Foundation of NJIT (Grant Nos. YKJ201853 and CKJA201807)。

摘　　要：A theoretical study on discrete vortex bound states is carried out near a vortex core in the presence of a van Hove singularity(VHS) near the Fermi level by solving Bogoliubov–de Gennes(Bd G) equations. When the VHS lies exactly at the Fermi level and also at the middle of the band, a zero-energy state and other higher-energy states whose energy ratios follow integer numbers emerge. These discrete vortex bound state peaks undergo a splitting behavior when the VHS or Fermi level moves away from the middle of the band. Such splitting behavior will eventually lead to a new arrangement of quantized vortex core states whose energy ratios follow half-odd-integer numbers.

关 键 词：vortex bound states van Hove singularity Fermi level density of states 

分 类 号：O413[理学—理论物理]