Superconducting phase diagram in Ca2-xNaxCuO 2Cl2-yBry

Yuji Zenitani, Teruhiko Suzuki, Hirokazu Kawashima, Jun Akimitsu

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Ca2CuO2Cl2-yBry (0 ≤ y ≤ 2) has the K2NiF4-type structure with halogens (Cl and Br) at their apical sites and superconductivity can be achieved by substituting Ca2+ sites with Na+. We have succeeded in making a comprehensive superconducting phase diagram of Ca2-xNa xCuO2Cl2-yBry by focusing on special attention to the relationship between the superconductivity and the Cu and Cl/Br distance in Ca2-xNaxCuO2Cl 2-yBry. We were successful in continuously changing the length of c-axis, which is closely related to the distance between the apical site and the CuO2 plane, or the distance between Cu and Cl/Br. Without changing the bonding distance between Cu and O in the CuO2 plane. This is the first example of this kind of control in cuprate superconductors.

Original languageEnglish
Pages (from-to)32-40
Number of pages9
JournalPhysica C: Superconductivity and its applications
Issue number1-2
Publication statusPublished - Feb 15 2005
Externally publishedYes

ASJC Scopus subject areas

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


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