Exact hole-induced resonating-valence-bonds in certain infinite U Hubbard models

ORAL

Abstract

We prove that the motion of a single hole induces the nearest-neighbor resonating-valence-bond (RVB)-like correlations in the infinite U Hubbard model on a triangular cactus -- a tree-like variant of a kagome lattice. The result is generalized to t-J models with antiferromagnetic interactions. This is a weak converse of Nagaoka's theorem of ferromagnetism on a bipartite lattice. The results can be generalized to SU(N) t-J models, where the hole motion induces resonating SU(N)-flavor singlets. We then speculate concerning possible topological and superconducting phases that can arise purely from the hole motion.

* This work was supported, in part, by NSF Grant No. DMR- 2000987 at Stanford University and by the Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering, under contract DE-AC02-76SF00515.

Publication: PHYSICAL REVIEW B 107, L140401 (2023)
and
arXiv preprint arXiv:2307.09500

Presenters

  • Kyung-Su Kim

    Stanford University

Authors

  • Kyung-Su Kim

    Stanford University

  • Hosho Katsura

    The University of Tokyo, Univ of Tokyo, University of Tokyo