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arXiv · 1912.01025

Emergent Fermi surface in a triangular-lattice SU(4) quantum antiferromagnet

Anna Keselman·Bela Bauer·Cenke Xu·Chao-Ming Jian
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Abstract

Motivated by multiple possible physical realizations, we study the SU(4) quantum antiferromagnet with a fundamental representation on each site of the triangular lattice. We provide evidence for a gapless liquid ground state of this system with an emergent Fermi surface of fractionalized fermionic partons coupled with a U(1) gauge field. Our conclusions are based on numerical simulations using the density matrix renormalization group (DMRG) method, which we support with a field theory analysis.

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Anna Keselman, Bela Bauer, Cenke Xu, Chao-Ming Jian. 2019-12-02. Emergent Fermi surface in a triangular-lattice SU(4) quantum antiferromagnet. https://doi.org/10.1103/physrevlett.125.117202

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