PIRSA:18110103

Doping a Spinon Fermi Surface Phase: Pair Density Wave in the Doped t-J Model with Ring Exchange on a Triangular Lattice

Xu, X. (2018). Doping a Spinon Fermi Surface Phase: Pair Density Wave in the Doped t-J Model with Ring Exchange on a Triangular Lattice. Perimeter Institute. https://pirsa.org/18110103

Xu, Xiao-Yan. Doping a Spinon Fermi Surface Phase: Pair Density Wave in the Doped t-J Model with Ring Exchange on a Triangular Lattice. Perimeter Institute, Dec. 07, 2018, https://pirsa.org/18110103 

          @misc{ pirsa_PIRSA:18110103,
            doi = {10.48660/18110103},
            url = {https://pirsa.org/18110103},
            author = {Xu, Xiao-Yan},
            keywords = {Condensed Matter},
            language = {en},
            title = {Doping a Spinon Fermi Surface Phase: Pair Density Wave in the Doped t-J Model with Ring Exchange on a Triangular Lattice},
            publisher = {Perimeter Institute},
            year = {2018},
            month = {dec},
            note = {PIRSA:18110103 see, \url{https://pirsa.org}}
          }

Xiao-Yan Xu Hong Kong University of Science and Technology (HKUST)

DOI 10.48660/18110103
Collection
Talk Type Scientific Series
Subject

Abstract

In our previous work (Phys. Rev. Lett. 121, 046401 (2018)), we found a quantum spin liquid phase with spinon Fermi surface in the two dimensional spin-1/2 Heisenberg model with four-spin ring exchange on a triangular lattice. In this work we dope the spinon Fermi surface phase by studying the t-J model with four-spin ring exchange. We perform density matrix renormalization group calculations on four-leg cylinders of a triangular lattice and find that the dominant pair correlation function is that of a pair density wave, i.e. it is oscillatory while decaying with distance with a power law. The doping dependence of the period is studied. This is the first example where pair density wave is the dominant pairing in a generic strongly interacting system where the pair density wave cannot be explained as a composite order and no special symmetry is required. Reference: 1. arXiv:1803.00999 [cond-mat.str-el] (Phys. Rev. Lett. 121, 046401 (2018)) 2. arXiv:1811.06538 [cond-mat.str-el]