Supersolid of Hardcore Bosons on the Face Centered Cubic Lattice

Details Supersolid of Hardcore Bosons on the Face Centered Cubic Lattice Supersolid of Hardcore Bosons on the Face Centered Cubic Lattice

2006-11-28

arxiv.org/abs/cond-mat/0611725v2

Phys. Rev. B 75, 180502(R), (2007)

Physics

Condensed Matter

Superconductivity

5pages, 6figures

Scientific paper

10.1103/PhysRevB.75.180502

We investigate a supersolid state in hardcore boson models on the face-centered-cubic (FCC) lattice. The supersolid state is characterized by a coexistence of crystalline order and superfluidity. Using a quantum Monte Carlo method based on the directed-loop algorithm, we calculate static structure factors and superfluid density at finite temperature, from which we obtain the phase diagram. The supersolid phase exists at intermediate fillings between a three-quarter-filled solid phase and a half-filled solid phase. We also discuss the mechanism of the supersolid state on the FCC lattice.

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