Physics – Condensed Matter – Superconductivity
Scientific paper
2004-11-05
Physics
Condensed Matter
Superconductivity
Scientific paper
10.1016/j.physc.2005.02.001
Measurements of the superconducting transition temperatures for Al-doped, C-doped and neutron-damaged-annealed MgB2 samples under pressure up to ~8 kbar are presented. The dT_c/dP values change systematically with the decrease of the ambient pressure T_c in a regular fashion. The evolution of the pressure derivatives can be understood assuming that the change in phonon spectrum is a dominant contribution to dT_c/dP.
Angst Manuel
Bud'ko Sergey L.
Canfield Paul. C.
Wilke R. H. T.
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