Mott insulators of ultracold fermionic alkaline earth atoms in three dimensions

Article

关键词: LARGE-N LIMIT;    QUANTUM PHASES;    SPIN LIQUID;    MODEL;    ANTIFERROMAGNET;    SYSTEMS;    PHYSICS;    STATES;    GASES;   

DOI  :  10.1103/PhysRevB.87.144423

来源: SCIE

【 摘 要 】

We study a class of SU(N) Heisenberg models, describing Mott insulators of fermionic ultracold alkaline earth atoms on the three-dimensional simple cubic lattice. Based on an earlier semiclassical analysis, magnetic order is unlikely, and we focus instead on a solvable large-N limit designed to address the competition among nonmagnetic ground states. We find a rich phase diagram as a function of the filling parameter k, composed of a variety of ground states spontaneously breaking lattice symmetries, and in some cases also time-reversal symmetry. One particularly striking example is a state spontaneously breaking lattice rotation symmetry, where the cubic lattice breaks up into bilayers, each of which forms a two-dimensional chiral spin liquid state.

【 授权许可】

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