PhysRevB.74.024505.pdf (307.44 kB)
Pressure dependence of the superconducting transition temperature in C6Yb and C6Ca
journal contribution
posted on 2015-04-24, 14:09 authored by Robert P. Smith, Anna KusmartsevaAnna Kusmartseva, Yuen T.C. Ko, Siddharth S. Saxena, Ana Akrap, Laszlo Forro, Mukul S. Laad, Thomas E. Weller, Mark Ellerby, Neal T. SkipperWe 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.
Funding
We would like to thank the EPSRC and Jesus and St. Catharine’s Colleges of the University of Cambridge for financial support.
History
School
- Science
Department
- Physics
Published in
PHYSICAL REVIEW BVolume
74Issue
2Pages
? - ? (4)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.Publisher
© American Physical SocietyVersion
- VoR (Version of Record)
Publisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Publication date
2006Notes
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.74.024505ISSN
1098-0121Publisher version
Language
- en