Single hole and vortex excitations in the doped Rokhsar-Kivelson quantum dimer model on the triangular lattice

Hugo Ribeiro, Samuel Bieri, and Dmitri Ivanov
Phys. Rev. B 76, 172301 – Published 30 November 2007

Abstract

We consider the doped Rokhsar-Kivelson quantum dimer model on the triangular lattice with one mobile hole (monomer) at the Rokhsar-Kivelson point. The motion of the hole is described by two branches of excitations: the hole may either move with or without a trapped Z2 vortex (vison). We perform a study of the hole dispersion in the limit where the hole-hopping amplitude is much smaller than the interdimer interaction. In this limit, the hole without vison moves freely and has a tight-binding spectrum. On the other hand, the hole with a trapped vison is strongly constrained due to interference effects and can only move via higher-order virtual processes.

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  • Received 6 August 2007

DOI:https://doi.org/10.1103/PhysRevB.76.172301

©2007 American Physical Society

Authors & Affiliations

Hugo Ribeiro, Samuel Bieri*, and Dmitri Ivanov

  • Institute of Theoretical Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland

  • *samuel.bieri@epfl.ch

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Issue

Vol. 76, Iss. 17 — 1 November 2007

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