Magnetic and charge orders in the ground state of the 2D repulsive Hubbard model

ORAL

Abstract

We systematically study the ground state of the two-dimensional repulsive Hubbard model as a function of doping and interaction strengths, using the auxiliary field quantum Monte-Carlo (AFQMC) method combined with a self-consistent constraint to control the sign problem. We focus on the spin and charge correlations, applying pinning fields to break translational symmetry and computing the spin and charge densities to probe the emergence of long-range order and collective modes. A phase diagram of spin-density waves is obtained. The effect of next-nearest-neighbor hopping is examined. The relation between the magnetic and pairing correlations will be discussed.

*This research is supported by simons foundation

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Presenters

  • Hao Xu

    • Department of physics, College of William and Mary

Authors

  • Hao Xu

    • Department of physics, College of William and Mary

  • Mingpu Qin

    • School of Physics and Astronomy, ShangHai JiaoTong university

  • Hao Shi

    • Center for Computational Quantum Physics, Simons foundation
    • Flatiron institute

  • Yuan-Yao He

    • Center for Computational Quantum Physics, Simons foundation
    • Center of Computational Quantum Physics, Flatiron Institute, New York City, USA
    • Simons Foundation

  • Ettore Vitali

    • Department of physics, California State University Fresno
    • California State University, Fresno

  • Shiwei Zhang

    • Center for Computational Quantum Physics, Simons foundation
    • Flatiron institute
    • Center for Computational Quantum Physics, Flatiron Institute; William & Mary
    • Center of Computational Quantum Physics, Flatiron Institute, New York City, USA
    • Center for Computational Quantum Physics, Flatiron Institute
    • Center for Computational Quantum Physics, Flatiron Institute, 162 5th Avenue, New York, NY 10010, Simons Foundation
    • Center for Computational Quantum Physics