Similarities in electronic properties of organic charge-transfer solids and layered cobaltates

Sumit Mazumdar, R. Torsten Clay, Hongtao Li

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


The apparently counterintuitive carrier concentration-dependent electronic properties of layered cobaltates have attracted wide interest. Here we point out that very similar carrier-concentration dependence has previously been noted in strongly correlated quasi-one dimensional (quasi-1D) organic charge-transfer solids. The normal states of both families can be understood, over the entire range of carrier concentration of interest, within the extended Hubbard Hamiltonian with significant intersite Coulomb interaction. As with the charge-transfer solids, superconductivity in the cobaltates appears to be limited to bandfilling of one-quarter. We point out further that there exist other families of correlated superconductors, such as spinels, where too strong correlations, geometric lattice frustration and bandfilling of one-quarter seem to be the essential features of the unconventional superconductors.

Original languageEnglish (US)
Pages (from-to)1722-1724
Number of pages3
JournalPhysica B: Condensed Matter
Issue number11
StatePublished - Jun 1 2012


  • Charge-transfer solids
  • Layered cobaltates
  • Strong correlations
  • Unconventional superconductors

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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