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Title: Pressure dependence of the superconducting transition temperature in C6Yb and C6Ca
Authors: Smith, Robert P.
Kusmartseva, Anna F.
Ko, Yuen T.C.
Saxena, Siddharth S.
Akrap, Ana
Forro, Laszlo
Laad, Mukul S.
Weller, Thomas E.
Ellerby, Mark
Skipper, Neal T.
Issue Date: 2006
Publisher: © American Physical Society
Citation: SMITH, R.P. ... et al, 2006. Pressure dependence of the superconducting transition temperature in C6Yb and C6Ca. Physical Review B - Condensed Matter and Materials Physics, 74 (2), 024505.
Abstract: 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.
Description: This article was published in the journal, Physical Review B [© American Physical Society]. It is also available at: http://dx.doi.org/10.1103/PhysRevB.74.024505
Sponsor: We would like to thank the EPSRC and Jesus and St. Catharine’s Colleges of the University of Cambridge for financial support.
Version: Published
DOI: 10.1103/PhysRevB.74.024505
URI: https://dspace.lboro.ac.uk/2134/17364
Publisher Link: http://dx.doi.org/10.1103/PhysRevB.74.024505
ISSN: 1098-0121
Appears in Collections:Published Articles (Physics)

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