TY  - JOUR
VL  - 74
IS  - 2
A1  - Smith, RP
A1  - Kusmartseva, A
A1  - Ko, YTC
A1  - Saxena, SS
A1  - Akrap, A
A1  - Forro, L
A1  - Laad, M
A1  - Weller, TE
A1  - Ellerby, M
A1  - Skipper, NT
TI  - Pressure dependence of the superconducting transition temperature in C6Yb and C6Ca
EP  -  ?
SN  - 1098-0121
JF  - PHYS REV B
UR  - https://discovery.ucl.ac.uk/id/eprint/9476/
KW  - GRAPHITE-INTERCALATION COMPOUNDS
KW  -  STATE
N2  - We have studied the evolution, with hydrostatic pressure, of the recently-discovered superconductivity in the graphite intercalation compounds C6Yb and C6Ca. We present pressure-temperature phase diagrams, for both superconductors, established by electrical transport and magnetization measurements. In the range 0-1.2 GPa the superconducting transition temperature increases linearly with pressure in both materials with dT(c)/dP=+0.37 +/- 0.01 and +0.50 +/- 0.05 K/GPa for C6Yb and C6Ca, respectively. The transition temperature in C6Yb, which has been measured up to 2.3 GPa, reaches a peak at around 1.8 GPa and then starts to drop. We also discuss how this pressure dependence may be explained within a plasmon pairing mechanism. (c) 2006 American Institute of Physics.
PB  - AMER PHYSICAL SOC
ID  - discovery9476
SP  - ? 
Y1  - 2006/07//
AV  - public
ER  -