{delta}-influence on the pressure-effect on T{sub c} of HgBa{sub 2}CuO{sub 4+{delta}} and the inverse parabolic T{sub c}-relation

Journal Article · Tue Aug 01 00:00:00 EDT 1995 · Journal of Superconductivity

DOI:https://doi.org/10.1007/BF00722813· OSTI ID:136177

Chu, C W; Cao, Y; Xiong, Q ^[1]

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1. Univ. of Houston, TX (United States); and others

The authors have observed a {delta}-independent linear pressure effect on T{sub c} of HgBa{sub 2}CuO{sub 4+{delta}} under hydrostatic pressures up to 1.7 GPa for {delta} {le} 0.30 but a nonlinear effect for {delta} > 0.30. These results, together with previous doping data, show a possible non-rigidity of the electron bands of the compounds, based on which previous phenomenological models of the pressure effect on T{sub c} are built, and thus suggest only a restricted universality for the inverse parabolic relation between T{sub c} and charge carriers per CuO{sub 2}-layer. In other words, factors in addition to charge carriers can affect high temperature superconductivity.

• Sponsoring Organization: USDOE
• OSTI ID: 136177
• Report Number(s): CONF-950144--; CNN: Grant DMR 91-22043; Grant F49620-93-1-0310
• Journal Information: Journal of Superconductivity, Journal Name: Journal of Superconductivity Journal Issue: 4 Vol. 8; ISSN 0896-1107; ISSN JOUSEH
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
COPPER OXIDES
ELECTRONIC STRUCTURE
HIGH-TC SUPERCONDUCTORS
MERCURY OXIDES
PRESSURE DEPENDENCE
TRANSITION TEMPERATURE
VERY HIGH PRESSURE