Superconductivity and the Quantum Hard-Core Dimer Gas

Daniel S. Rokhsar and Steven A. Kivelson
Phys. Rev. Lett. 61, 2376 – Published 14 November 1988
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Abstract

We discuss the short-range resonating-valence-bond system as realized by a quantum hard-core dimer gas of arbitrary density on a two-dimensional square lattice. When the dimers completely cover the lattice, we argue that there is a first-order transition from a dimer crystal to an insulating quantum liquid state which possesses low-energy, neutral, spinless excitations which we call "resonons." For less than close-packed densities, the ground state is a superfluid. In addition to the usual Goldstone mode, there are low-energy, spinless zone-boundary excitations.

  • Received 21 March 1988

DOI:https://doi.org/10.1103/PhysRevLett.61.2376

©1988 American Physical Society

Authors & Affiliations

Daniel S. Rokhsar

  • IBM Research Division, T. J. Watson Research Center, P. O. Box 218, Yorktown Heights, New York 10598

Steven A. Kivelson

  • Department of Physics, State University of New York at Stony Brook, Stony Brook, New York 11974

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Issue

Vol. 61, Iss. 20 — 14 November 1988

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