Pressure dependence of the superconducting transition temperature in nominal Rb0.5Cs2.5C60
- 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)
Description
We report measurements of the superconducting transition temperature in a compound with a nominal composition Cs2.5Rb0.5C60 under hydrostatic pressure of up to 15.5 kbars. We observe two transitions, at temperatures T* and Tc in this pelletized sample. We identify the lower temperature transition T* with the onset of intergranular shielding currents. The upper transition temperature Tc(P) falls on a universal Tc(P) curve, defined from similar data obtained previously on K3C60 and Rb3C60, after we shift the pressure axis for our data by -2.6 kbars. We identify Tc as a superconducting transition in Rb2CsC60 on the basis of the compressibility analysis and published values of the lattice parameters for alkali-doped C60, as well as Tc(P=0) and (dTc/dP)P=0
Additional details
Publishing Information
- Journal Title
- Physical Review. B, Condensed Matter
- Journal Volume
- 49
- Journal Issue
- 5
- Journal Page Range
- p. 3619-3621.
- ISSN
- 0163-1829
- CODEN
- PRBMDO
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 25039409
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- CARBON COMPOUNDS; CESIUM ADDITIONS; COMPRESSIBILITY; FULLERENES; RUBIDIUM ADDITIONS; SUPERCONDUCTIVITY; TRANSITION TEMPERATURE; VERY HIGH PRESSURE
- Descriptors DEC
- CARBON; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; ELEMENTS; MECHANICAL PROPERTIES; NONMETALS; PHYSICAL PROPERTIES; THERMODYNAMIC PROPERTIES