| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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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 |
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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.
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Received: 22 June 2022
Revised: 21 August 2022
Accepted manuscript online: 05 September 2022
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PACS:
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74.25.Jb
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(Electronic structure (photoemission, etc.))
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74.25.Ha
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(Magnetic properties including vortex structures and related phenomena)
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74.25.Op
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(Mixed states, critical fields, and surface sheaths)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11804154) and Scientific Research Foundation of NJIT (Grant No. YKJ201853). |
Corresponding Authors:
Delong Fang
E-mail: fangdel@njit.edu.cn
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Cite this article:
Delong Fang(方德龙) Vortex bound states influenced by the Fermi surface anisotropy 2023 Chin. Phys. B 32 037403
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