Supersolid phase of cold fermionic polar molecules in two-dimensional optical lattices
Supersolid phase of cold fermionic polar molecules in two-dimensional optical lattices
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DOI：
10.1103/physreva.83.053629
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发表时间：
2011-01
影响因子：
2.9
通讯作者：
Liang He;W. Hofstetter
中科院分区：
文献类型：
--
作者：
Liang He;W. Hofstetter
We study a system of ultracold fermionic polar molecules in a two-dimensional square lattice interacting via both the long-range dipole-dipole interaction and a short-range on-site attractive interaction. Singlet-superfluid, change density wave, and supersolid phases are found to exist in the system. We map out the zero-temperature phase diagram and find that the supersolid phase is considerably stabilized by the dipole-dipole interaction and thus can exist over a large region of filling factors. We study the melting of the supersolid phase with increasing temperature, map out a finite-temperature phase diagram of the system at fixed filling, and determine the parameter region where the supersolid phase can possibly be observed in experiments.
