Properties of the Non-Magnetic Insulating Phase of the Triangular Lattice Hubbard Model from Density Matrix Renormalization Group Calculations

ORAL

Abstract

Experimental studies have found signatures of a quantum spin liquid phase in organic crystals whose physics is believed to be described by the Hubbard model on the triangular lattice at half filling. Several theoretical studies, including with the density matrix renormalization group (DMRG) on finite systems, confirm the appearance of a possible spin liquid phase between the metallic and magnetically ordered phases of this model. However, the precise nature of the phase is still not completely clear. In this work, we use infinite-system DMRG (iDMRG) on a cylinder geometry in a mixed real- and momentum-space basis to further investigate the ground state phase diagram of the Hubbard model on the triangular lattice, with a focus on the purported spin liquid regime. iDMRG allows for calculation of additional quantities such as long-range correlation functions and logarithmic growth of the entanglement entropy that were not available in past numerical work; with these tools, we are able to provide a more complete description of the non-magnetic insulating phase of the model.

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Presenters

  • Aaron Szasz

    University of California Berkeley and Lawrence Berkeley National Laboratory

Authors

  • Aaron Szasz

    University of California Berkeley and Lawrence Berkeley National Laboratory

  • Johannes Motruk

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

  • Joel Moore

    Physics, Univ of California - Berkeley, Materials Science Division, Lawrence Berkeley National Laboratory, Univ of California - Berkeley, Physics, University of California, Berkeley, University of California Berkeley and Lawrence Berkeley National Laboratory, UC Berkeley