Effect of pressure on the superconducting transition temperature of doped and neutron-damaged MgB2

Details Effect of pressure on the superconducting transition temperature of doped and neutron-damaged MgB2 Effect of pressure on the superconducting transition temperature of doped and neutron-damaged MgB2

2004-11-05

arxiv.org/abs/cond-mat/0411149v1

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.

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