Direct transition between a singlet Mott insulator and a superconductor.
Direct transition between a singlet Mott insulator and a superconductor.
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单线态莫特绝缘体和超导体之间的直接过渡。
DOI：
10.1103/physrevlett.86.5361
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发表时间：
2001
影响因子：
8.6
通讯作者：
E. Tosatti
中科院分区：
文献类型：
--
作者：
M. Capone;M. Fabrizio;E. Tosatti
我们认为，一个正常的费米液体和单线态，自旋带隙的莫特绝缘体不能连续连接，和一些中间相必须侵入它们之间。通过明确地工作出一个案例研究，其中的单线态绝缘体是稳定的轨道简并和一个倒置的洪德规则耦合，模仿Jahn-Teller效应，我们发现，中间相是超导体。
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.