Direct Transition Between a Singlet Mott Insulator and a Superconductor

Details Direct Transition Between a Singlet Mott Insulator and a Superconductor Direct Transition Between a Singlet Mott Insulator and a Superconductor

2001-01-26

arxiv.org/abs/cond-mat/0101402v3

Phys. Rev. Lett. 86, 5361 (2001)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figure, Changes to the figures. Accepted for publication on Physical Review Letters

Scientific paper

10.1103/PhysRevLett.86.5361

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.

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