Pressure dependence of the superconducting transition temperature in nominal Rb[sub 0. 5]Cs[sub 2. 5]C[sub 60]

Journal Article · Tue Feb 01 04:00:00 EST 1994 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.49.3619· OSTI ID:5248213

Movshovich, R; Thompson, J D ^[1]; Chen, C; Lieber, C M ^[2]

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1. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
2. Department of Chemistry and Division of Applied Sciences, Harvard University, Cambridge, Massachusetts 02138 (United States)

We report measurements of the superconducting transition temperature in a compound with a nominal composition Cs[sub 2.5]Rb[sub 0.5]C[sub 60] under hydrostatic pressure of up to 15.5 kbars. We observe two transitions, at temperatures [ital T][sup *] and [ital T][sub [ital c]] in this pelletized sample. We identify the lower temperature transition [ital T][sup *] with the onset of intergranular shielding currents. The upper transition temperature [ital T][sub [ital c]]([ital P]) falls on a universal [ital T][sub [ital c]]([ital P]) curve, defined from similar data obtained previously on K[sub 3]C[sub 60] and Rb[sub 3]C[sub 60], after we shift the pressure axis for our data by [minus]2.6 kbars. We identify [ital T][sub [ital c]] as a superconducting transition in Rb[sub 2]CsC[sub 60] on the basis of the compressibility analysis and published values of the lattice parameters for alkali-doped C[sub 60], as well as [ital T][sub [ital c]]([ital P]=0) and ([ital dT][sub [ital c]]/[ital dP])[sub [ital P]=0].

• OSTI ID: 5248213
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 49:5; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360607* -- Other Materials-- Superconducting Properties-- (1992-)
ALLOYS
CARBON
CARBON COMPOUNDS
CESIUM ADDITIONS
CESIUM ALLOYS
COMPRESSIBILITY
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
FULLERENES
MECHANICAL PROPERTIES
NONMETALS
PHYSICAL PROPERTIES
RUBIDIUM ADDITIONS
RUBIDIUM ALLOYS
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
VERY HIGH PRESSURE