Vortex bound states influenced by the Fermi surface anisotropy

doi:10.1088/1674-1056/ac8f32

中国物理B ›› 2023, Vol. 32 ›› Issue (3): 37403-037403.doi: 10.1088/1674-1056/ac8f32

Vortex bound states influenced by the Fermi surface anisotropy

Delong Fang(方德龙)^†

Department of Mathematics and Physics, Nanjing Institute of Technology, Nanjing 211167, China

收稿日期:2022-06-22 修回日期:2022-08-21 接受日期:2022-09-05 出版日期:2023-02-14 发布日期:2023-03-01
通讯作者: Delong Fang E-mail:fangdel@njit.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 11804154) and Scientific Research Foundation of NJIT (Grant No. YKJ201853).

Vortex bound states influenced by the Fermi surface anisotropy

Delong Fang(方德龙)^†

Department of Mathematics and Physics, Nanjing Institute of Technology, Nanjing 211167, China

Received:2022-06-22 Revised:2022-08-21 Accepted:2022-09-05 Online:2023-02-14 Published:2023-03-01
Contact: Delong Fang E-mail:fangdel@njit.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 11804154) and Scientific Research Foundation of NJIT (Grant No. YKJ201853).

摘要/Abstract

摘要： The spatial distribution of vortex bound states is often anisotropic, which is correlated with the underlying property of materials. In this work, we examine the effects of Fermi surface anisotropy on vortex bound states. The large-scale calculation of vortex bound states is introduced in the presence of fourfold or twofold Fermi surface by solving the Bogoliubov-de Gennes (BdG) equations. Two kinds of quasiparticles' behaviors can be extracted from the local density of states (LDOS) around a vortex. The angle-dependent quasiparticles will move from high energy to low energy when the angle varies from curvature maxima to minima of the Fermi surface, while the angle-independent quasiparticles tend to stay at a relatively higher energy. In addition, the weight of angle-dependent quasiparticles can be enhanced by the increasing anisotropy degree of Fermi surface.

关键词: vortex, anisotropy, Fermi surface, local density of states

Abstract: The spatial distribution of vortex bound states is often anisotropic, which is correlated with the underlying property of materials. In this work, we examine the effects of Fermi surface anisotropy on vortex bound states. The large-scale calculation of vortex bound states is introduced in the presence of fourfold or twofold Fermi surface by solving the Bogoliubov-de Gennes (BdG) equations. Two kinds of quasiparticles' behaviors can be extracted from the local density of states (LDOS) around a vortex. The angle-dependent quasiparticles will move from high energy to low energy when the angle varies from curvature maxima to minima of the Fermi surface, while the angle-independent quasiparticles tend to stay at a relatively higher energy. In addition, the weight of angle-dependent quasiparticles can be enhanced by the increasing anisotropy degree of Fermi surface.

Key words: vortex, anisotropy, Fermi surface, local density of states

中图分类号: (Electronic structure (photoemission, etc.))

74.25.Jb

74.25.Ha (Magnetic properties including vortex structures and related phenomena) 74.25.Op (Mixed states, critical fields, and surface sheaths)

Delong Fang(方德龙). Vortex bound states influenced by the Fermi surface anisotropy[J]. 中国物理B, 2023, 32(3): 37403-037403.

Delong Fang(方德龙). Vortex bound states influenced by the Fermi surface anisotropy[J]. Chin. Phys. B, 2023, 32(3): 37403-037403.

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Vortex bound states influenced by the Fermi surface anisotropy

Vortex bound states influenced by the Fermi surface anisotropy

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