Direct Transition between a Singlet Mott Insulator and a Superconductor

2001/01/31 by Massimo Capone, M. Capone, M. Fabrizio +3 · 3 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevlett.86.5361

published as Phys. Rev. Lett. 86, 5361 (2001) · 4 pages, 3 figure, Changes to the figures. Accepted for publication on Physical Review Letters

arxiv created 2001/05/15 · openalex publication_date 2001/06/04 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We argue that a normal Fermi liquid and a singlet, spin-gapped Mott insulator cannot be continuously connected, and that some intermediate phase must intrude between them. By explicitly working out a case study where the singlet insulator is stabilized by orbital degeneracy and an inverted Hund's rule coupling, mimicking a Jahn-Teller effect, we find that the intermediate phase is a superconductor.

Citations

• Mott metal-insulator transition in the half-filled Hubbard model on the triangular lattice

Cited by

• Strongly Correlated Superconductivity
• Strongly Correlated Superconductivity and Pseudogap Phase near a Multiband Mott Insulator
• Properties of Gutzwiller wave functions for multiband models