A stable Algebraic Spin Liquid in a Hubbard model

Abstract

We show the existence of a stable Algebraic Spin Liquid (ASL) phase in a Hubbard model defined on a honeycomb lattice with spin-dependent hopping that breaks time-reversal symmetry. The effective spin model is the Kitaev model for large on-site repulsion. The gaplessness of the emergent Majorana fermions is protected by the time reversal (TR) invariance of this model. We prove that the effective spin model is TR invariant in the entire Mott phase thus ensuring the stability of the ASL. The model can be physically realized in cold atom systems and we propose experimental signals of the ASL.

Published in PRL

References in corpus (8)

• Quantum spin-liquid emerging in two-dimensional correlated Dirac fermions
• Exact results for spin dynamics and fractionization in the Kitaev Model
• Absence of a Spin Liquid Phase in the Hubbard Model on the Honeycomb Lattice
• Speckle Imaging of Spin Fluctuations in a Strongly Interacting Fermi Gas
• SU(2) gauge theory of the Hubbard model and application to the honeycomb lattice
• $Z_2$ spin liquid and chiral antiferromagnetic phase in Hubbard model on the honeycomb lattice: duality between Schwinger-fermion and Schwinger-boson representations
• Spin liquids on a honeycomb lattice: Projective Symmetry Group study of Schwinger fermion mean-field theory
• Anyonic Braiding in Optical Lattices

Cited by in corpus (1)

• Correlated Dirac Particles and Superconductivity on the Honeycomb Lattice