Do Bose metals exist in Nature?

Details Do Bose metals exist in Nature? Do Bose metals exist in Nature?

2005-10-22

arxiv.org/abs/cond-mat/0510602v1

Physics

Condensed Matter

Strongly Correlated Electrons

12 pages, 2 figures, to appear in the proceedings of the Peyres conference

Scientific paper

10.1063/1.2178048

We revisit the concept of superfluidity in bosonic lattice models in low dimensions. Then, by using numerical and analytical results obtained previously for equivalent spinless fermion models, we show that the gapless phase of 1D interacting bosons may be either superfluid or -remarkably- metallic and not superfluid. The latter phase -the Bose metal- should be, according to the mentioned results, a robust and stable phase in 1D. In higher dimensionalities we speculate on the possibility of a stable Bose metallic phase on the verge of a Mott transition.

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