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Quantum dimer model for the pseudogap metal.

Matthias Punk1, Andrea Allais2, Subir Sachdev3

  • 1Institute for Theoretical Physics, University of Innsbruck, 6020 Innsbruck, Austria; Institute for Quantum Optics and Quantum Information, Austrian Academy of Sciences, 6020 Innsbruck, Austria; Physics Department, Ludwig-Maximilians-Universität München, 80333 Munich, Germany;

Proceedings of the National Academy of Sciences of the United States of America
|July 22, 2015
PubMed
Summary
This summary is machine-generated.

We introduce a quantum dimer model for hole-doped cuprates, revealing a fractionalized Fermi liquid state. This model explains metallic behavior at low hole density (p) without symmetry breaking.

Keywords:
Fermi liquiddimer modelspin liquidsuperconductivity

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Area of Science:

  • Condensed matter physics
  • Quantum magnetism
  • Materials science

Background:

  • Hole-doped cuprates exhibit complex metallic states at low hole densities.
  • Understanding the underlying electronic structure and emergent phenomena is crucial.

Purpose of the Study:

  • To propose a quantum dimer model for the metallic state of hole-doped cuprates.
  • To investigate the emergence of a fractionalized Fermi liquid state.

Main Methods:

  • Development of a quantum dimer model.
  • Utilizing exact diagonalization on lattices up to 8x8.
  • Analysis of quasiparticle residue.

Main Results:

  • The model describes a fractionalized Fermi liquid with no symmetry breaking.
  • Small hole pocket Fermi surfaces were observed, with area dependent on hole density (p).
  • Anisotropic quasiparticle residue around Fermi surfaces was shown.

Conclusions:

  • The proposed quantum dimer model provides a framework for understanding the metallic state in hole-doped cuprates.
  • The findings suggest a novel electronic state with implications for experimental observations.