Accession Number:

ADA243433

Title:

Pressure Dependence of Tc in Tl2Ba2CaCu2O8 at Hydrostatic Pressures to 6 GPa

Descriptive Note:

Technical rept. Oct 90-Sep 91,

Corporate Author:

NAVAL WEAPONS CENTER CHINA LAKE CA

Report Date:

1991-10-01

Pagination or Media Count:

14.0

Abstract:

Studies of the pressure dependencies of the critical temperatures of hole-doped high Tc superconductors in the past have demonstrated, with very few exceptions, monotonically increasing Tcs with increasing pressure. This is thought to be due to the pressure-induced injection of holes onto the conduction planes resulting from a change in the apical Cu-O bond length, a view consistent with the drop of critical temperature with decreasing oxygen concentration and hence decreasing hole concentration. Recently work has been performed which indicates that for many of the thallium-based cuprates, increases in the oxygen content in as-made samples, actually decreases Tc, while decreases in oxygen content produce sharp increases in Tc, followed by decreases with further oxygen reduction.

Subject Categories:

  • Electrical and Electronic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE