Abstract
Measurements of the superconducting transition temperature vs purely hydrostatic pressure (P<0.6 GPa) on specimens of compositions (0≤x≤0.14) and (0≤y≤0.06) yield an approximately linear relation between /dP and the carrier concentration induced in the planes by chemical substitution with /dP ranging from -0.6 K/GPa (y=0.06) to +2.2 K/GPa (x=0.14). A simple phenomenological model clarifies the /dP behavior and provides a physical origin for the observed anomalous peak in (P) at P∼4 GPa [Klotz, Reith, and Schilling, Physica C 172, 423 (1991)].
- Received 13 January 1993
DOI:https://doi.org/10.1103/PhysRevB.47.8385
©1993 American Physical Society