Non-thermal superconductivity in photo-doped multi-orbital Hubbard systems
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arXiv
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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2023
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| _version_ | 1866916080843227136 |
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| author | Ray, Sujay Murakami, Yuta Werner, Philipp |
| author_facet | Ray, Sujay Murakami, Yuta Werner, Philipp |
| contents | Superconductivity in laser-excited correlated electron systems has attracted considerable interest due to reports of light-induced superconducting-like states. Here we explore the possibility of non-thermal superconducting order in strongly interacting multi-orbital Hubbard systems, using non-equilibrium dynamical mean field theory. We find that a staggered $η$-type superconducting phase can be realized on a bipartite lattice in the high photo-doping regime, if the effective temperature of the photo-carriers is sufficiently low. The $η$ superconducting state is stabilized by Hund coupling - a positive Hund coupling favors orbital-singlet spin-triplet $η$ pairing, whereas a negative Hund coupling stabilizes spin-singlet orbital-triplet $η$ pairing. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2305_06760 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Non-thermal superconductivity in photo-doped multi-orbital Hubbard systems Ray, Sujay Murakami, Yuta Werner, Philipp Strongly Correlated Electrons Superconductivity Superconductivity in laser-excited correlated electron systems has attracted considerable interest due to reports of light-induced superconducting-like states. Here we explore the possibility of non-thermal superconducting order in strongly interacting multi-orbital Hubbard systems, using non-equilibrium dynamical mean field theory. We find that a staggered $η$-type superconducting phase can be realized on a bipartite lattice in the high photo-doping regime, if the effective temperature of the photo-carriers is sufficiently low. The $η$ superconducting state is stabilized by Hund coupling - a positive Hund coupling favors orbital-singlet spin-triplet $η$ pairing, whereas a negative Hund coupling stabilizes spin-singlet orbital-triplet $η$ pairing. |
| title | Non-thermal superconductivity in photo-doped multi-orbital Hubbard systems |
| topic | Strongly Correlated Electrons Superconductivity |
| url | https://arxiv.org/abs/2305.06760 |