Pressure Study of the Noncentrosymmetric 5d-Electron Superconductors CaMSi3 (M = \text{Ir}, Pt)
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概要
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We report a hydrostatic pressure study on the Rashba-type noncentrosymmetric superconductors CaMSi3 (M=\text{Ir}, Pt). The temperature dependence of the resistivity of both compounds is well described by the conventional Bloch--Grüneisen formalism at each pressure. This fact suggests that electron--phonon scattering is dominant in these compounds. The superconducting critical temperature T_{\text{c}} decreases with pressure above 0.41 to 2 GPa at a rate of {\sim}0.2 K/GPa for both compounds. This T_{\text{c}} behavior can be explained with a modest decrease in the density of states based on the conventional BCS theory.
- 2012-07-15
著者
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Yonezawa Shingo
Department Of Neurosurgery Aomori Prefectural Central Hospital
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Bauer Ernst
Institute Of Solid State Physics Vienna University Of Technology
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Maeno Yoshiteru
Department Of Physics Faculty Of Science Hiroshima University
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Yonezawa Shingo
Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
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Eguchi Gaku
Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
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KNEIDINGER Friedrich
Institute of Solid State Physics, Vienna University of Technology, A-1040 Vienna, Austria
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SALAMAKHA Leonid
Institute of Solid State Physics, Vienna University of Technology, A-1040 Vienna, Austria
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Bauer Ernst
Institute of Solid State Physics, Vienna University of Technology, A-1040 Vienna, Austria
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Maeno Yoshiteru
Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
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