2018/08/31 by Aaron Szasz, Johannes Motruk, Michael P. Zaletel +1 · 2 citations
Physics and Astronomy · #cond-mat.str-el
paper · pdf · doi:10.1103/physrevx.10.021042
published as Phys. Rev. X 10, 021042 (2020) · v2: 15 pages, 13 figures, plus 30 pages (38 figures) Supplemental Material. Substantial additional data supporting the original conclusions: additional cylinder geometries; flux insertion; MPS transfer matrix spectra; analysis of the metal-insulator transition; and analysis of domain walls between the two chiralities. v1:7 pages, 4 figures, plus 15 pages (22 figures) Supplementary Material
arxiv created 2020/02/27 · arxiv updated 2020/05/27
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.