Physics – Condensed Matter – Superconductivity
Scientific paper
2010-06-24
Eguchi, G. and Peets, D. C. and Kriener, M. and Maeno, Y. and Nishibori, E. and Kumazawa, Y. and Banno, K. and Maki, S. and Sa
Physics
Condensed Matter
Superconductivity
8 pages, 8 figures
Scientific paper
10.1103/PhysRevB.83.024512
We report crystallographic, specific heat, transport, and magnetic properties of the recently discovered noncentrosymmetric 5d-electron superconductors CaIrSi3 (Tc = 3.6 K) and CaPtSi3 (Tc = 2.3 K). The specific heat suggests that these superconductors are fully gapped. The upper critical fields are less than 1 T, consistent with limitation by conventional orbital depairing. High, non-Pauli-limited {\mu}0 Hc2 values, often taken as a key signature of novel noncentrosymmetric physics, are not observed in these materials because the high carrier masses required to suppress orbital depairing and reveal the violated Pauli limit are not present.
Banno K.
Eguchi Gaku
Kriener M.
Kumazawa Y.
Maeno Yasushi
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