Quantum dimer model for the pseudogap metal

We propose a quantum dimer model for the metallic state of the hole-doped cuprates at low hole density,p. The Hilbert space is spanned by spinless, neutral, bosonic dimers and spinS= 1/2, charge +efermionic dimers. The model realizes a “fractionalized Fermi liquid” with no symmetry breaking and smal...

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Published inProceedings of the National Academy of Sciences - PNAS Vol. 112; no. 31; pp. 9552 - 9557
Main Authors Punk, Matthias, Allais, Andrea, Sachdev, Subir
Format Journal Article
LanguageEnglish
Published United States National Academy of Sciences 04.08.2015
National Acad Sciences
Subjects
Density
Experiments
Hilbert space
Lattice theory
Metals
Physical Sciences
Quantum theory
superconductivity
dimer model
spin liquid
Fermi liquid
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ISSN0027-8424
1091-6490
DOI10.1073/pnas.1512206112

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Summary:We propose a quantum dimer model for the metallic state of the hole-doped cuprates at low hole density,p. The Hilbert space is spanned by spinless, neutral, bosonic dimers and spinS= 1/2, charge +efermionic dimers. The model realizes a “fractionalized Fermi liquid” with no symmetry breaking and small hole pocket Fermi surfaces enclosing a total area determined byp. Exact diagonalization, on lattices of sizes up to 8 × 8, shows anisotropic quasiparticle residue around the pocket Fermi surfaces. We discuss the relationship to experiments.
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Author contributions: M.P., A.A., and S.S. performed research; and M.P., A.A., and S.S. wrote the paper.
Reviewers: A.G., College de France; and M.O., Institute for Solid State Physics, University of Tokyo.
Contributed by Subir Sachdev, June 23, 2015 (sent for review May 14, 2015; reviewed by Antoine Georges and Masaki Oshikawa)
ISSN:0027-8424
1091-6490
DOI:10.1073/pnas.1512206112