Studies of superconductivity and structure for CaC6 to pressures above 15 GPa
Debessai, M. · Hamlin, J. J. · Schilling, J. S. · Meng, Y. · Rosenmann, D. · Hinks, D. G. · Claus, H.
الأصل · EN
The dependence of the superconducting transition temperature Tc of CaC6 has been determined as a function of hydrostatic pressure in both helium-loaded gas and diamond-anvil cells to 0.6 and 32 GPa, respectively. Following an initial increase at the rate +0.39(1) K/GPa, Tc drops abruptly from 15 K to 4 K at 10 GPa. Synchrotron x-ray measurements to 15 GPa point to a structural transition near 10 GPa from a rhombohedral to a higher symmetry phase.
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