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Superconductivity in the Tl-Ca-Ba-Cu-O System: Synthesis, characterization and mechanism

Ganguli, AK and Swamy, Nanjunda KS and Subbanna, GN and Rajumon, MK and Sarma, DD and Rao, CNR (1988) Superconductivity in the Tl-Ca-Ba-Cu-O System: Synthesis, characterization and mechanism. In: Modern Physics Letters B, 2 (10). pp. 1169-1176.

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Abstract

Synthesis and characterization of some of the members of the Tl-Ca-Ba-Cu-O system are presented. $T_c$ in both the $TlCa_{n-1}Ba_2Cu_nO_{2n+3}$ and $Tl_2Ca_{n-1}Ba_2Cu_nO_{2n+4}$ series increase with the number of Cu-O layers, n; $T_c$ in the latter series with two Tl-O layers are generally higher than in the former with a single Tl-O layer. Tl in the cuprates is in the 3+ state while Cu is in the 1+ and 2+ states, showing the importance of oxygen holes. The concentration of these holes seems to increase with the number of Tl-O layers.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to World Scientific Publishing.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 28 Feb 2008
Last Modified: 27 Aug 2008 13:12
URI: http://eprints.iisc.ernet.in/id/eprint/13117

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