Direct transition between a singlet Mott insulator and a superconductor

被引：36

作者：

Capone, M

Fabrizio, M

Tosatti, E

机构：

[1] Scuola Int Super Studi Avanzati, I-34014 Trieste, Italy

[2] Ist Nazl Fis Mat, Unita Trieste, SISSA, I-34014 Trieste, Italy

[3] Int Ctr Theoret Phys, I-34014 Trieste, Italy

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 23期

关键词：

D O I：

10.1103/PhysRevLett.86.5361

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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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页码：5361 / 5364

页数：4

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