From valence bond solid to unconventional superconductivity in the organic charge-transfer solids

S. Mazumdar, R. T. Clay, H. Li

Research output: Contribution to journalArticlepeer-review

Abstract

We show that superconductivity is absent within the frac(1, 2)-filled band triangular lattice repulsive Hubbard model that has been proposed for organic charge-transfer solids. We posit that organic superconductivity is rather reached from a bond-charge density wave that either constitutes the insulating state proximate to superconductivity, or is extremely close in energy to the antiferromagnetic state, and replaces the latter under pressure. The bond-charge density wave can be described within an effective attractive U extended Hubbard Hamiltonian with repulsive nearest neighbor interaction V. A first-order transition from the insulating to the superconducting state occurs within the model with increasing frustration.

Original languageEnglish (US)
Pages (from-to)2419-2421
Number of pages3
JournalSynthetic Metals
Volume159
Issue number21-22
DOIs
StatePublished - Nov 2009

Keywords

  • Correlated electrons
  • Organic superconductors
  • Unconventional superconductivity

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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