Superconductivity in the two-band Hubbard model

2014/12/31 by Akihisa Koga, Philipp Werner
Materials Science · Mathematics · Physics and Astronomy · #Condensed matter physics #Coupling (piping) #Field (mathematics) #Hubbard model #Iron-based superconductors research #Materials science #Mathematics #Monte Carlo method #Physics #Physics of Superconductivity and Magnetism #Quantum Monte Carlo #Quantum and electron transport phenomena #Quantum mechanics #Statistical physics #Superconductivity #cond-mat.str-el

paper · pdf · doi:10.1103/physrevb.91.085108

published as Phys. Rev. B 91, 085108 (2015) · 7 pages, 8 figures

openalex publication_date 2015/02/12 · arxiv created 2015/02/13 · arxiv updated 2015/02/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We study the two-band Hubbard model in infinite dimensions by solving the dynamical mean-field equations with a strong coupling continuous-time quantum Monte Carlo method and show that an s-wave superconducting state can be stabilized in the repulsively interacting case. We discuss how this superconducting state competes with the metallic and paired Mott states. The effects of the Hund coupling and crystalline electric field are also addressed.

Citations

• Ferromagnetism in the Hubbard model with orbital degeneracy in infinite dimensions
• Strongly Correlated Superconductivity and Pseudogap Phase near a Multiband Mott Insulator
• Strongly Correlated Superconductivity
• First-Order Pairing Transition and Single-Particle Spectral Function in the Attractive Hubbard Model
• High-Spin to Low-Spin and Orbital Polarization Transitions in Multiorbital Mott Systems
• Superconductivity in the two-band Hubbard model in infinite dimensions
• Continuous-time Monte Carlo methods for quantum impurity models