Chiral spin liquid phase in an optical lattice at mean-field level
arXiv:2306.16466 · doi:10.1103/PhysRevB.109.165108
Abstract
We study an optical Raman square lattice with synthetic gauge flux to show chiral spin liquid (CSL) phase for cold atoms based on slave-rotor theory and spinon mean-field theory, respectively. An effective U() gauge flux generated by Raman potentials plays a major role in realizing the CSL phase. By using slave-rotor techniques we find CSL phase at intermediate on-site Fermi Hubbard interacting regime. For the strong interacting regime we derive an effective spin model including up to the four spin interactions. By spinon mean-field analysis it is shown that CSL phase is stabilized in the case of strong magnetic frustration. The two mean-field approximation methods give consistent phase diagrams and provide qualitative numerical evidence of the CSL phase.
arXiv commentThe experimental scheme is improved, and discussions are revised according to referees' reports
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