POSSIBLE OVERDOPING IN TLSRLACUO5 AND SUPERCONDUCTIVITY IN TLBALACUO5 BY ISOVALENT-CATION SUBSTITUTION

SUNDARESAN, A; NAGARAJAN, R; GUPTA, LC; VIJAYARAGHAVAN, R; SHARON, M; TAMHANE, AS; PINTO, R

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POSSIBLE OVERDOPING IN TLSRLACUO5 AND SUPERCONDUCTIVITY IN TLBALACUO5 BY ISOVALENT-CATION SUBSTITUTION

SUNDARESAN, A; NAGARAJAN, R; GUPTA, LC; VIJAYARAGHAVAN, R; SHARON, M; TAMHANE, AS; PINTO, R

URI: http://dx.doi.org/10.1103/PhysRevB.49.13123
http://dspace.library.iitb.ac.in/xmlui/handle/10054/4804
http://hdl.handle.net/10054/4804

Date: 1994

Abstract:

It is known that superconductivity in TlSrLaCuO5 is due to the overlap of empty Tl 6s band with the antibonding Cu 3d(x2-y2) band at the Fermi level. This motivated us to investigate the effects of isovalent-cation substitution in superconducting TlSrLaCuO5 and semiconducting TlBaLaCuO5. We have succeeded in inducing superconductivity in TIBaLaCuO5 by introducing Ca2+ at the Ba sites.

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