Theory of Supersolids beyond Mean-Field

Details Theory of Supersolids beyond Mean-Field Theory of Supersolids beyond Mean-Field

2008-10-06

arxiv.org/abs/0810.0996v1

Europhys. Lett. 85, 20009 (2009)

Physics

Condensed Matter

Other Condensed Matter

4 pages, 3 figures

Scientific paper

We investigate the newly discovered supersolid phase by solving in random phase approximation the anisotropic Heisenberg model of the hard-core boson ${}^4$He lattice. We include nearest and next-nearest neighbor interactions and calculate exactly all pair correlation functions in a cumulant expansion scheme. We describe the properties of the normal solid and supersolid phases and argue that based on analogies to the fermionic half filled extended Hubbard model the supersolid state corresponds to a bond-ordered-wave.

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