Loop Current and Antiferromagnetic States in Fermionic Hubbard Model with Staggered Flux at Half Filling

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3 Citations (Scopus)

Abstract

Anticipating realization of interacting fermions in an optical lattice with a large gauge field, we consider phase transitions and loop currents in a two-dimensional S = 1/2 fermionic-Hubbard model with π/2-staggered flux at half filling. We use a variational Monte Carlo method, which is reliable even for strong correlations. As a trial wave function, a coexistent state of antifferomagnetic and staggered-flux orders is studied. In a strongly correlated regime, the ground state becomes an insulating coexistent state with loop currents. By comparing fermions with bosons, we discuss an important role of Pauli principle.

Original languageEnglish
Pages (from-to)13-16
Number of pages4
JournalPhysics Procedia
Volume81
DOIs
Publication statusPublished - 2016
Event28th International Symposium on Superconductivity, ISS 2015 - Tokyo, Japan
Duration: 2015 Nov 162015 Nov 18

Keywords

  • Hubbard model
  • Mott transition
  • artificial magnetic filed
  • cold atom
  • loop current
  • optical lattice
  • staggered flux
  • variational Monte Carlo method

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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