Ground-state phase diagram of Gaussian-core bosons in two dimensions

Article

关键词: 2-DIMENSIONAL SYSTEMS;    TRANSITIONS;    PHYSICS;   

DOI  :  10.1103/PhysRevB.93.174520

来源: SCIE

【 摘 要 】

The ground state of a two-dimensional (2D) system of Bose particles of spin zero, interacting via a repulsive Gaussian-core potential, has been investigated by means of quantum Monte Carlo simulations. The quantum phase diagram is qualitatively identical to that of 2D Yukawa bosons. While the system is a fluid at all densities for weak coupling, in the strong-coupling regime it transitions upon compression from a low-density superfluid to a crystal, and then into a reentrant superfluid phase. No evidence of a (supersolid) cluster crystal phase is seen.

【 授权许可】

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