Supersolid bose-fermi mixtures in optical lattices

被引：91

作者：

Titvinidze, I. ^{[1
]}

Snoek, M. ^{[1
]}

Hofstetter, W. ^{[1
]}

机构：

[1] Univ Frankfurt, Inst Theoret Phys, D-60438 Frankfurt, Germany

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 10期

关键词：

D O I：

10.1103/PhysRevLett.100.100401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study a mixture of strongly interacting bosons and spinless fermions with on-site repulsion in a three-dimensional optical lattice. For this purpose we develop and apply a generalized dynamical mean-field theory, which is exact in infinite dimensions and reliably describes the full range from weak to strong coupling. We restrict ourselves to half filling. For weak Bose-Fermi repulsion a supersolid forms, in which bosonic superfluidity coexists with charge-density wave order. For stronger interspecies repulsion the bosons become localized while the charge-density wave order persists. The system is unstable against phase separation for weak repulsion among the bosons.

引用

页数：4

共 39 条

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