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】
Free