Pressure dependence of the electronic density of states and {ital T}{sub {ital c}} in superconducting Rb{sub 3}C{sub 60}

Journal Article · Tue Oct 01 04:00:00 EDT 1996 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.54.R9662· OSTI ID:385726

Diederichs, J; Gangopadhyay, A K; Schilling, J S ^[1]

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1. Department of Physics, Washington University, Campus Box 1105, One Brookings Drive, St. Louis, Missouri 63130 (United States)

The functional dependence of the superconducting transition temperature {ital T}{sub {ital c}} on the electronic density of states {ital N}({ital E}{sub {ital f}}) was determined for Rb{sub 3}C{sub 60} by measuring the magnetic susceptibility under hydrostatic pressure to {approximately} 1 GPa in a commercial SQUID magnetometer. Both {ital T}{sub {ital c}} and {ital N}({ital E}{sub {ital f}}) decrease under pressure at the rates {minus}31{percent}/GPa and {minus}14.5{percent}/GPa, respectively, but lie above the corresponding values for K{sub 3}C{sub 60} at the same lattice parameter. The present results are consistent with weak-coupling BCS theory with characteristic energy {ital E}{sub char}/{ital k}{sub {ital B}}{approx_equal} 320{endash}810 K. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 385726
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 14 Vol. 54; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BCS THEORY
ELECTRONIC STRUCTURE
ENERGY-LEVEL DENSITY
FULLERENES
MAGNETIC SUSCEPTIBILITY
PRESSURE DEPENDENCE
RUBIDIUM COMPOUNDS
SUPERCONDUCTORS
TRANSITION TEMPERATURE
VERY HIGH PRESSURE