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Electrical and infrared characterization of the semiconducting phases of YBa2Cu3O6+x

Authors
Journal
Solid State Communications
0038-1098
Publisher
Elsevier
Publication Date
Volume
92
Issue
7
Identifiers
DOI: 10.1016/0038-1098(94)00542-7
Keywords
  • A: High-T Csuperconductors
  • Semiconductors
  • C: Point Defects
  • D: Electronic Transport
  • Optical Properties

Abstract

Abstract Semiconductivity in YBa 2Cu 3O 6+ x has been characterized over nearly the complete range of oxygen concentrations. Resistivity vs temperature data reveal a thermally activated conductivity with systematic variation of the activation energy with oxygen content, hitherto unreported. This suggests the existence of some acceptor-like defects which correlate with oxygen content. Infrared absorption measurements on the same samples highlight a hitherto ignored spectral feature which varies with oxygen consistent with the proposed defect picture.

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