Appearance of a Maximum ofTcand a Large Negative dTc/dPin the Superconducting Tl-Ba-Ca-Cu-O Compounds under Pressure
- 15 November 1990
- journal article
- letter
- Published by Physical Society of Japan in Journal of the Physics Society Japan
- Vol. 59 (11), 3839-3842
- https://doi.org/10.1143/jpsj.59.3839
Abstract
The pressure dependence of T c for the superconducting Tl-Ba-Ca-Cu-O compounds has been measured. It is found that the pressure coefficients of T c in Tl 2 Ba 2 CaCu 2 O 8 change the sign from positive to negative with a maximum T c and that the highly hole-doped Tl 2 Ba 2 CuO 6 compounds show a large negative value of d T c /d P . These results revealed a new feature of the pressure dependence of T c in the hole-doped superconductors and can be interpreted speculatively in terms of the hole concentration in the CuO 2 planes assuming that the carrier concentration is redistributed with pressure.Keywords
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