Constrained-path Quantum Monte Carlo study of the three-orbital Hubbard model for iron-based superconductors

ORAL

Abstract

Pairing and magnetic properties of the three-orbital Hubbard model for iron-based superconductors are systematically studied via the constrained-path quantum Monte Carlo method. We further develop the algorithm for multi-orbital Hubbard models in general and introduce parallel techniques to allow for large-lattice simulations. In addition, the effects of the additional $d_{xy}$ orbital are studied by comparing with our previous simulation on the two-orbital model [1].\\[ 4pt] [1] G.-K. Liu et al., J. Phys.: Condens. Matter 26, 325601 (2014)

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Authors

  • Guangkun Liu

    • Department of Physics and Astronomy, University of Tennessee and Department of Physcis, Beijing Normal University

  • Shuhua Liang

    • Department of Physics and Astronomy, University of Tennessee and Materials Science and Technology Division, ORNL

  • Chris Bishop

    • Department of Physics and Astronomy, University of Tennessee and Materials Science and Technology Division, ORNL

  • Elbio Dagotto

    • Department of Physics and Astronomy, University of Tennessee and Materials Science and Technology Division, ORNL