Impurity effect on Bogoliubov Fermi surfaces: Analysis based on iron-based superconductors
Fuente:
arXiv
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| Autori principali: | , , |
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| Natura: | Preprint |
| Pubblicazione: |
2023
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| _version_ | 1866909823984992256 |
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| author | Miki, Tatsuya Ikeda, Hiroaki Hoshino, Shintaro |
| author_facet | Miki, Tatsuya Ikeda, Hiroaki Hoshino, Shintaro |
| contents | The effect of impurities on a superconductor with Bogoliubov Fermi surfaces (BFSs) is studied using a realistic tight-binding model. Based on the band structure composed of $d$-orbitals in tetragonal FeSe, whose S-doped sample is a potential material for BFS, we construct the superconducting state by introducing a time-reversal broken pair potential in terms of the band index. We further consider the effect of impurities on the BFS, where the impurity potential is defined as a local potential for the original $d$-orbitals. The self-energy is calculated using the (self-consistent) Born approximation, which shows an enhancement of the single-particle spectral weight on the Fermi surface. This is consistent with the previous phenomenological theory and is justified by the present more detailed calculation based on the FeSe-based material. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2304_04533 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Impurity effect on Bogoliubov Fermi surfaces: Analysis based on iron-based superconductors Miki, Tatsuya Ikeda, Hiroaki Hoshino, Shintaro Superconductivity Strongly Correlated Electrons The effect of impurities on a superconductor with Bogoliubov Fermi surfaces (BFSs) is studied using a realistic tight-binding model. Based on the band structure composed of $d$-orbitals in tetragonal FeSe, whose S-doped sample is a potential material for BFS, we construct the superconducting state by introducing a time-reversal broken pair potential in terms of the band index. We further consider the effect of impurities on the BFS, where the impurity potential is defined as a local potential for the original $d$-orbitals. The self-energy is calculated using the (self-consistent) Born approximation, which shows an enhancement of the single-particle spectral weight on the Fermi surface. This is consistent with the previous phenomenological theory and is justified by the present more detailed calculation based on the FeSe-based material. |
| title | Impurity effect on Bogoliubov Fermi surfaces: Analysis based on iron-based superconductors |
| topic | Superconductivity Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2304.04533 |