Abstract
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 language | English |
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Pages (from-to) | 32-40 |
Number of pages | 9 |
Journal | Physica C: Superconductivity and its applications |
Volume | 419 |
Issue number | 1-2 |
DOIs | |
Publication status | Published - Feb 15 2005 |
Externally published | Yes |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering