Absence of superconductivity and valence bond order in the Hubbard-Heisenberg model for organic charge-transfer solids

N. Gomes, R. T. Clay, S. Mazumdar

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

A frustrated, effective 1/2-filled band Hubbard-Heisenberg model has been proposed for describing the strongly dimerized charge-transfer solid families κ-(ET)2X and Z[Pd(dmit)2]2. In addition to showing unconventional superconductivity, these materials also exhibit antiferromagnetism, candidate spin-liquid phases, and, in the case of Z = EtMe3P, a spin-gapped phase that has sometimes been referred to as a valence bond solid. We show that neither superconductivity nor the valence bond order phase occurs within the Hubbard-Heisenberg model. We suggest that a description based on 1 4 -filling, that is reached when the carrier concentration per molecule instead of per dimer is considered, thus may be appropriate.

Original languageEnglish (US)
Article number385603
JournalJournal of Physics Condensed Matter
Volume25
Issue number38
DOIs
StatePublished - Sep 25 2013

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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