Exploring possible Fermi surface nesting and the nature of heavy quasiparticles in the spin-triplet superconductor candidate CeRh2As2
Bo Chen, Hao Liu, Qi-Yi Wu, Chen Zhang, Xue-Qing Ye, Yin-Zou Zhao, Jiao-Jiao Song, Xin-Yi Tian, Ba-Lei Tan, Zheng-Tai Liu, Mao Ye, Zhen-Hua Chen, Yao-Bo Huang, Da-Wei Shen, Ya-Hua Yuan, Jun He, Yu-Xia Duan, Jian-Qiao Meng
DOI 10.1103/PhysRevB.110.L041120 · Physical Review B
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Abstract
In this Letter, we investigate the electronic structure of a spin-triplet superconductor candidate CeRh2As2 using high-resolution angle-resolved photoemission spectroscopy and density functional theory calculations. Notably, possible 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 CeRh2As2's unconventional superconductivity and magnetism. Further exploration promises advances in superconductivity research.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| CeRh2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.35 | Pressure not reported | midpoint |
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