Possible influences of ionic charges, radii, softness and magnetic impurities on the superconductivity in cuprates
Artikel i vetenskaplig tidskrift, 1996

Cuprate model cluster calculations are performed to explore possible sensitive parameters to the stability of a cluster pair state. Effects of replacing Ca2+ by {Mg2+; Na+; K+; Sc3+; Cu+; Cu2+; Zn2+} and Cu2+ by {Mg2+; Ni2+; Zn2+} in a Ca2Cu4O4 cluster are investigated. Ionic charge is found to stabilize the pair state, while the ionic radius determines the distance to the CuO2 plane which will break the pair state. Magnetic impurities such as Ni2+ are found to reduce the pair stability. The non-magnetic Mg2+ and Zn2+ stabilize the pair state. Soft ions in the calcium position also stabilize the pair state.

Författare

Itai Panas

Chalmers, Institutionen för oorganisk miljökemi

Rafael Gatt

Institutionen för fysik

Chemical Physics Letters

0009-2614 (ISSN)

Vol. 259 247-251

Ämneskategorier

Teoretisk kemi

Den kondenserade materiens fysik