Pressure study of the noncentrosymmetric 5d-electron superconductors CaMSi3 (M= Ir, Pt)

Details Pressure study of the noncentrosymmetric 5d-electron superconductors CaMSi3 (M= Ir, Pt) Pressure study of the noncentrosymmetric 5d-electron superconductors CaMSi3 (M= Ir, Pt)

2012-04-17

arxiv.org/abs/1204.3796v1

Physics

Condensed Matter

Superconductivity

4 pages, 4 figures

Scientific paper

We report hydrostatic pressure study on the Rashba-type noncentrosymmetric superconduc- tors CaMSi3 (M= Ir, Pt). The temperature dependence of the resistivity for both compounds is well described by the conventional Bloch-Gr\"uneisen formalism at each pressure. This fact suggests that electron-phonon scattering is dominant in these compounds. The superconducting critical temperature Tc decreases by pressure as \sim 0.2 K/GPa above 0.41 GPa to 2 GPa for both compounds. This behavior of Tc can be explained with a modest decrease of the density of states based on the conventional BCS theory.

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