paper

Chiral Spin Liquid and Quantum Criticality in Extended Heisenberg Models on the Triangular Lattice

arXiv:1604.07829 · doi:10.1103/PhysRevB.95.035141

Abstract

We investigate the - Heisenberg model on the triangular lattice with an additional scalar chirality term and show that a chiral spin liquid is stabilized in a sizeable region of the phase diagram. This topological phase is situated in between a coplanar Néel ordered and a non-coplanar tetrahedrally ordered phase. Furthermore we discuss the nature of the spin-disordered intermediate phase in the - model. We compare the groundstates from Exact Diagonalization with a Dirac spin liquid wavefunction and propose a scenario where this wavefunction describes the quantum critical point between the magnetically ordered phase and a putative spin liquid.

6 pages, 5 figures (+ supp. mat.)

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