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]

*This work was supported by the Scientific Discovery through Advanced Computing (SciDAC) program and by the Theory Institute for Materials and Energy Spectroscopies (TIMES).

–

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