Properties of holons in the Quantum Dimer Model

TL;DR

This paper introduces a doped quantum dimer model that captures the behavior of electrons in Mott insulators, revealing phases like unconventional superconductivity and superfluidity, and explaining holon properties relevant to cuprate superconductors.

Contribution

It presents a novel doped quantum dimer model that retains electron Fermi statistics and explores its phase diagram and holon properties, connecting to high-temperature superconductor physics.

Findings

Identification of a d-wave hole-pair superconductor at low doping

Discovery of a bosonic superfluid phase at high doping

Holons can bind topological defects, becoming bosons

Abstract

I introduce a doped two-dimensional quantum dimer model describing a doped Mott insulator and retaining the original Fermi statistics of the electrons. This model shows a rich phase diagram including a d-wave hole-pair unconventional superconductor at small enough doping and a bosonic superfluid at large doping. The hole kinetic energy is shown to favor binding of topological defects to the bare fermionic holons turning them into bosons, in agreement with arguments based on RVB wave-functions. Results are discussed in the context of cuprates superconductors.