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Spontaneous Formation of a Non-uniform Chiral Spin Liquid in Moat-band Lattices by Sedrakyan, Tigran A.; Glazman, Leonid I.; Kamenev, Alex is a scholarly article available to read on EtoBox.

What is Spontaneous Formation of a Non-uniform Chiral Spin Liquid in Moat-band Lattices about?

A number of lattices exhibit moat-like band structures, i.e. a band with infinitely degenerate energy minima attained along a closed line in the Brillouin zone. If such a lattice is populated with hard-core bosons, the degeneracy prevents their condensation. At half-filling, the system is equivalent to $s=1/2$ XY model at zero magnetic field, while absence of condensation translates into the absence of magnetic order in the XY plane. Here we show that the ground state breaks the time-reversal as well as inversion symmetries. This state, which may be identified with the chiral spin liquid, has a bulk gap and chiral gapless edge excitations. The applications of the developed analytical theory include an explanation of recent numerical findings and a suggestion for the chiral spin liquid realizations in experiments with cold atoms in optical lattices.

Author

Sedrakyan, Tigran A.; Glazman, Leonid I.; Kamenev, Alex

Published

2014

Language

EN