Slave-boson Formalism for Superconducting Pairing at Strong Coupling
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arXiv
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| Autori principali: | , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866913162403512320 |
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| author | Mazumdar, Sarbajit Issing, Jonas Seufert, Jannis Riegler, David Wölfle, Peter Thomale, Ronny Klett, Michael |
| author_facet | Mazumdar, Sarbajit Issing, Jonas Seufert, Jannis Riegler, David Wölfle, Peter Thomale, Ronny Klett, Michael |
| contents | We study the emergence of superconductivity in the one-band Hubbard model using the spin-rotation-invariant Kotliar-Ruckenstein slave-boson (SB) approach. Motivated by its intrinsically renormalized mean-field ground state, we construct an effective pairing vertex from dynamical fluctuations about the saddle point. Solving the anisotropic, frequency-dependent gap equation on the square lattice, we map the pairing instabilities across doping, interaction, temperature and real-frequency gap structure that qualitatively match experimental cuprate observations. This framework merges strong-correlation SB-type renormalizations with RPA-type pairing transparency, providing a scalable route to modeling multi-orbital superconductivity at strong coupling. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_26233 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Slave-boson Formalism for Superconducting Pairing at Strong Coupling Mazumdar, Sarbajit Issing, Jonas Seufert, Jannis Riegler, David Wölfle, Peter Thomale, Ronny Klett, Michael Superconductivity Strongly Correlated Electrons We study the emergence of superconductivity in the one-band Hubbard model using the spin-rotation-invariant Kotliar-Ruckenstein slave-boson (SB) approach. Motivated by its intrinsically renormalized mean-field ground state, we construct an effective pairing vertex from dynamical fluctuations about the saddle point. Solving the anisotropic, frequency-dependent gap equation on the square lattice, we map the pairing instabilities across doping, interaction, temperature and real-frequency gap structure that qualitatively match experimental cuprate observations. This framework merges strong-correlation SB-type renormalizations with RPA-type pairing transparency, providing a scalable route to modeling multi-orbital superconductivity at strong coupling. |
| title | Slave-boson Formalism for Superconducting Pairing at Strong Coupling |
| topic | Superconductivity Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2605.26233 |