Chiral spin liquid phase of the triangular lattice Hubbard model

ORAL

Abstract


Motivated by experimental studies that have found signatures of a quantum spin liquid phase in organic crystals whose structure is well described by the two-dimensional triangular lattice, we study the Hubbard model on this lattice at half filling using the infinite-system density matrix renormalization group (iDMRG) method. On infinite cylinders with finite circumference, we identify an intermediate phase between observed metallic behavior at low interaction strength and Mott insulating spin-ordered behavior at strong interactions. Chiral ordering from spontaneous breaking of time-reversal symmetry, a fractionally quantized spin Hall response, and characteristic level statistics in the entanglement spectrum in the intermediate phase provide strong evidence for the existence of a chiral spin liquid in the full two-dimensional limit of the model. [arXiv: 1808.00463]

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Presenters

  • Aaron Szasz

    Physics, University of California, Berkeley

Authors

  • Aaron Szasz

    Physics, University of California, Berkeley

  • Johannes Motruk

    University of California, Berkeley and Lawrence Berkeley National Laboratory, Physics, University of California, Berkeley, Lawrence Berkeley National Laboratory

  • Michael Zaletel

    University of California - Santa Barbara, University of California, Berkeley, Physics, University of California, Berkeley, Physics, University of California at Berkeley

  • Joel Moore

    University of California, Berkeley, Department of Physics, University of California, Berkeley, California 94720, USA, University of California, Berkeley and Lawrence Berkeley National Laboratory, Physics, University of California, Berkeley, University of California, Berkeley, and Lawrence Berkeley National Laboratory