Evolution and Instability of Bogoliubov Fermi Surfaces under Zeeman Field
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| Format: | Preprint |
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2024
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| _version_ | 1866929696513458176 |
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| author | Mori, Tatsuaki Watanabe, Hiroshi Ikeda, Hiroaki |
| author_facet | Mori, Tatsuaki Watanabe, Hiroshi Ikeda, Hiroaki |
| contents | We theoretically investigate the evolution and instability of the Bogoliubov Fermi surface (BFS) in the spherical $j=3/2$ model under a Zeeman field. The applied field induces a pronounced expansion in the BFS with $j_z = \pm 3/2$ component. Such behavior can be detected by spectroscopic techniques such as angle-resolved photoemission spectroscopy (ARPES). Interestingly, the Pauli susceptibility exhibits behavior that appears discontinuous just below the transition temperature at zero field, even though it is a second-order transition. This is due to spontaneous magnetization. Furthermore, the analysis of the bogolon correlations in the superconducting phase suggests the possibility of the chiral $p$- or $f$-wave bogolon pairing instabilities rather than the Pomeranchuk instability. These chiral states coexist with the chiral $d$-wave superconducting state, spontaneously break inversion symmetry, and lead to the disappearance of the torus-shaped BFS structure. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2410_11326 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Evolution and Instability of Bogoliubov Fermi Surfaces under Zeeman Field Mori, Tatsuaki Watanabe, Hiroshi Ikeda, Hiroaki Superconductivity Strongly Correlated Electrons We theoretically investigate the evolution and instability of the Bogoliubov Fermi surface (BFS) in the spherical $j=3/2$ model under a Zeeman field. The applied field induces a pronounced expansion in the BFS with $j_z = \pm 3/2$ component. Such behavior can be detected by spectroscopic techniques such as angle-resolved photoemission spectroscopy (ARPES). Interestingly, the Pauli susceptibility exhibits behavior that appears discontinuous just below the transition temperature at zero field, even though it is a second-order transition. This is due to spontaneous magnetization. Furthermore, the analysis of the bogolon correlations in the superconducting phase suggests the possibility of the chiral $p$- or $f$-wave bogolon pairing instabilities rather than the Pomeranchuk instability. These chiral states coexist with the chiral $d$-wave superconducting state, spontaneously break inversion symmetry, and lead to the disappearance of the torus-shaped BFS structure. |
| title | Evolution and Instability of Bogoliubov Fermi Surfaces under Zeeman Field |
| topic | Superconductivity Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2410.11326 |