Semiconductivity in the double-zigzag-chain complex oxide RE 2Ba2CuPtO8 (RE identical to Y, Er, Ho)

Naoki Toyota, P. Koorevaar, J. Van Der Berg, P. H. Kes, J. A. Mydosh, T. Shishido, Y. Saito, N. Kuroda, K. Ukei, T. Sasaki, T. Fukuda

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3 Citations (Scopus)

Abstract

The temperature dependence of electrical conductance has been measured on single crystals of the newly discovered oxide compound RE2Ba 2CuPtO8 (RE identical to Y, Er, Ho). This Pt- containing oxide is orthorhombic and has a characteristic double-zigzag chain of -O 2-Pt4+-O2-Cu2+-O2- in columns running parallel to the b axis, which is the growth direction of the rectangular-shaped long-bar single crystals. All these compounds are found to be semiconductors with energy gaps of about 0.2-0.4 eV. They exhibit conductances proportional to exp(-T-12/) rather than the thermally activated exp(-T-1) dependence. Such behaviour is discussed in terms of two models, namely one-dimensional variable-range hopping and the lattice-vibration-induced band-broadening effect.

Original languageEnglish
Article number019
Pages (from-to)3721-3726
Number of pages6
JournalJournal of Physics: Condensed Matter
Volume1
Issue number23
DOIs
Publication statusPublished - 1989 Dec 1
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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