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| Format: | Preprint |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2311.05035 |
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| _version_ | 1866914760832843776 |
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| author | Samokhin, K. V. |
| author_facet | Samokhin, K. V. |
| contents | We derive microscopically the Ginzburg-Landau free energy functional for a superconductor in which the Cooper pairs are formed not only by quasiparticles from the same band, but also by quasiparticles from different bands. In the simplest case of an s-wave or d-wave pairing in a two-band system, the order parameter has three components describing two intraband and one interband pair condensates. The interband pairing-specific terms in the free energy bring about some qualitative changes in the phase diagram, for example, time-reversal symmetry breaking superconducting states are stabilized at low temperatures. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2311_05035 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Ginzburg-Landau energy of multiband superconductors with interband pairing Samokhin, K. V. Superconductivity We derive microscopically the Ginzburg-Landau free energy functional for a superconductor in which the Cooper pairs are formed not only by quasiparticles from the same band, but also by quasiparticles from different bands. In the simplest case of an s-wave or d-wave pairing in a two-band system, the order parameter has three components describing two intraband and one interband pair condensates. The interband pairing-specific terms in the free energy bring about some qualitative changes in the phase diagram, for example, time-reversal symmetry breaking superconducting states are stabilized at low temperatures. |
| title | Ginzburg-Landau energy of multiband superconductors with interband pairing |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2311.05035 |