科研之友
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摘要
We study the ground-state properties in a hard-core Bose-Hubbard model on a layered triangular lattice. With the combined use of the cluster mean-field theory and the density matrix renormalization group method, we discuss the effect of interlayer coupling on supersolid states realized in a single-layered model. By examining the distributions for the particle density and superfluid order parameter, a rich phase diagram of the system is obtained. We find that supersolid states are widely stabilized at commensurate filling, in contrast to those in the case of the single-layered model. The nature of supersolid states is also addressed.
- 出版日期2014-6
