Origin of the semiconducting-to-superconducting transition of La2-xCa1+xCu2O6 under high-oxygen-pressure annealing

H. Shibata, Azusa Matsuda, K. Kinoshita, T. Watanabe, T. Yamada

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The Madelung energy of La2-xCa1+xCu2O6 system, whose properties change from semiconductor to superconductor under high-oxygen-pressure annealing, is calculated. We find the increase in VA, the difference in Madelung site potential between the apex and the CuO2 planes oxygen, promotes the superconducting transition in this system. Slight intercalation of oxygen between two CuO2 planes is found to be of primary importance in determining VA.

Original languageEnglish
Pages (from-to)12315-12317
Number of pages3
JournalPhysical Review B
Issue number17
Publication statusPublished - 1994
Externally publishedYes


ASJC Scopus subject areas

  • Condensed Matter Physics

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