Exploring Fermi Surface Nesting and the Nature of Heavy Quasiparticles in the Spin-Triplet Superconductor Candidate CeRh\(_2\)As\(_2\)

In this study, we investigate the electronic structure of a spin-triplet superconductor candidate CeRh\(_2\)As\(_2\) using high-resolution angle-resolved photoemission spectroscopy and density functional theory calculations. Notably, Fermi surface nesting hints at connections to magnetic excitation...

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Published inarXiv.org
Main Authors Chen, Bo, Liu, Hao, Qi-Yi, Wu, Zhang, Chen, Xue-Qing Ye, Yin-Zou, Zhao, Jiao-Jiao, Song, Xin-Yi, Tian, Ba-Lei, Tan, Zheng-Tai, Liu, Mao Ye, Chen, Zhen-Hua, Yao-Bo, Huang, Da-Wei, Shen, Ya-Hua, Yuan, He, Jun, Yu-Xia, Duan, Jian-Qiao Meng
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 21.03.2024
Subjects
Anisotropy
Density functional theory
Electron spin
Electronic properties
Electronic structure
Electrons
Elementary excitations
Fermi surfaces
Nesting
Photoelectric emission
Quadrupoles
Unconventional superconductivity
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Summary:In this study, we investigate the electronic structure of a spin-triplet superconductor candidate CeRh\(_2\)As\(_2\) using high-resolution angle-resolved photoemission spectroscopy and density functional theory calculations. Notably, Fermi surface nesting hints at connections to magnetic excitation or quadrupole density wave phenomena, elucidating the superconducting mechanisms. Measured band structures reveal primarily localized 4f electrons, with minor itinerant contributions. Additionally, a transition from localized to itinerant behavior and significant c-f hybridization anisotropy underscore the role of f-electrons in shaping electronic properties. These findings deepen our understanding of CeRh\(_2\)As\(_2\)'s unconventional superconductivity and magnetism. Further exploration promises advances in superconductivity research.
ISSN:2331-8422
DOI:10.48550/arxiv.2403.14057