Absence of Bose condensation on lattices with moat bands

Article

关键词: ONE DIMENSION;    HELIUM II;    FERMIONS;    GASES;    SUPERFLUIDITY;    GRAPHENE;    STATE;   

DOI  :  10.1103/PhysRevB.89.201112

来源: SCIE

【 摘 要 】

We study hard-core bosons on a class of frustrated lattices with the lowest Bloch band having a degenerate minimum along a closed contour, the moat, in the reciprocal space. We show that at small density the ground state of the system is given by a noncondensed state, which may be viewed as a state of fermions subject to Chern-Simons gauge field. At fixed density of bosons, such a state exhibits domains of incompressible liquids. Their fixed densities are given by fractions of the reciprocal-space area enclosed by the moat.

【 授权许可】

Free