Quantum magnetic properties of the SU(2N) Hubbard model in the square lattice: A quantum Monte Carlo study

Zi Cai, Hsiang-Hsuan Hung, Lei Wang, and Congjun Wu
Phys. Rev. B 88, 125108 – Published 5 September 2013

Abstract

We employ the determinant projector quantum Monte Carlo method to investigate the ground-state magnetic properties in the Mott insulating states of the half-filled SU(4) and SU(6) Fermi-Hubbard model in the two-dimensional square lattice, which is free of the sign problem. The long-range antiferromagnetic Neel order is found for the SU(4) case with a small residual Neel moment. Quantum fluctuations are even stronger in the SU(6) case. Numeric results are consistent with either a vanishing or even weaker Neel ordering than that of SU(4).

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  • Received 4 April 2013

DOI:https://doi.org/10.1103/PhysRevB.88.125108

©2013 American Physical Society

Authors & Affiliations

Zi Cai1,2, Hsiang-Hsuan Hung1,3, Lei Wang4, and Congjun Wu1

  • 1Department of Physics, University of California, San Diego, California 92093, USA
  • 2Department of Physics and Arnold Sommerfeld Center for Theoretical Physics, Ludwig-Maximilians-Universität München, Theresienstr. 37, 80333 Munich, Germany
  • 3Department of Electrical and Computer Engineering, University of Illinois, Urbana, Illinois 61801, USA
  • 4Theoretische Physik, ETH Zurich, 8093 Zurich, Switzerland

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Issue

Vol. 88, Iss. 12 — 15 September 2013

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