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2020 IPS Conference
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Corporate Members
Chiral Spin Liquids in Arrays of Spin Chains
Eran Sela [1] , Gregory Gorohovsky [1] , Rodrigo Pereira [2]
[1] Tel Aviv University
[2] Universidade de Sao Paulo
I will describe a coupled-chain construction for chiral spin liquids in two-dimensional spin systems. Starting from a one-dimensional zigzag spin chain and imposing SU(2) symmetry in the framework of non-Abelian bosonization, I provide a tractable approach that faithfully describes the low-energy physics of an exactly solvable model with a three-spin interaction. Generalizing the construction to the two-dimensional case, I will describe a theory that incorporates the universal properties of the chiral spin liquid predicted by Kalmeyer and Laughlin: charge-neutral edge states, gapped spin-1/2 bulk excitations, and ground state degeneracy on the torus signalling the topological order of this quantum state. In addition, I will argue that the chiral spin liquid phase is more easily stabilized in frustrated lattices containing corner-sharing triangles, such as the extended kagome lattice, than in the triangular lattice. I will discuss generalizations to more exotic non-Abelian chiral spin liquids for spin-1 systems.