Nature of hole states in cuprate superconductors

Apurva Mehta, Joseph DiCarlo, Alexandra Navrotsky

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

This study addresses the nature of the hole states in the high oxidation state cuprates. From the thermochemistry of oxidation in the cuprate superconductors, specifically inLa2-xAxCuO4-x/2+δ (A =Ba, Sr, Ca, Pb) and YBa2Cu3O6+δ, a model is proposed that assigns a major fraction of the holes in these "Cu3+" materials to states which chemically are "peroxidelike," involving holes paired on adjacent oxygens. Based on this hypothesis previously reported structural observations on NaCuO2, KCuO2,La2-xSrxCuO4-x/2+δ, and YBa2Cu3O6+δ are modeled. Electrical properties (including superconductivity) of the high oxidation state cuprates are closely related to these structural trends.

Original languageEnglish (US)
Pages (from-to)173-185
Number of pages13
JournalJournal of Solid State Chemistry
Volume101
Issue number1
DOIs
StatePublished - Nov 1992
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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