2134/17364 Robert P. Smith Robert P. Smith Anna Kusmartseva Anna Kusmartseva Yuen T.C. Ko Yuen T.C. Ko Siddharth S. Saxena Siddharth S. Saxena Ana Akrap Ana Akrap Laszlo Forro Laszlo Forro Mukul S. Laad Mukul S. Laad Thomas E. Weller Thomas E. Weller Mark Ellerby Mark Ellerby Neal T. Skipper Neal T. Skipper Pressure dependence of the superconducting transition temperature in C6Yb and C6Ca Loughborough University 2015 untagged Physical Sciences not elsewhere classified 2015-04-24 14:09:32 Journal contribution https://repository.lboro.ac.uk/articles/journal_contribution/Pressure_dependence_of_the_superconducting_transition_temperature_in_C6Yb_and_C6Ca/9408398 We have studied the evolution, with hydrostatic pressure, of the recently-discovered superconductivity in the graphite intercalation compounds C 6 Yb and C 6 Ca . We present pressure-temperature phase diagrams, for both superconductors, established by electrical transport and magnetization measurements. In the range 0–1.2GPa the superconducting transition temperature increases linearly with pressure in both materials with dT c ∕dP=+0.37±0.01 and +0.50±0.05K∕GPa for C 6 Yb and C 6 Ca , respectively. The transition temperature in C 6 Yb , which has been measured up to 2.3GPa , reaches a peak at around 1.8GPa and then starts to drop. We also discuss how this pressure dependence may be explained within a plasmon pairing mechanism.