AC heat capacity and resistivity measurements on the pressure-induced superconductor without inversion center
✍ Scribed by N. Tateiwa; Y. Haga; S. Ikeda; T.D. Matsuda; E. Yamamoto; Y. Okuda; Y. Miyauchi; R. Settai; Y. Ōnuki
- Publisher
- Elsevier Science
- Year
- 2008
- Tongue
- English
- Weight
- 191 KB
- Volume
- 403
- Category
- Article
- ISSN
- 0921-4526
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✦ Synopsis
We present the result of an antiferromagnet CeIrSi 3 without inversion center by measuring the heat capacity and the electrical resistivity of CeIrSi 3 . Both physical quantities were measured in the same run for the same single crystal sample. A huge heat capacity anomaly was observed at the superconducting transition temperature T sc ¼ 1:6 K where the zero-resistivity was observed. The jump of the heat capacity DC ac =C ac is 5:7 AE 0:1 at 2.58 GPa. This value is the largest among previously reported superconducting materials, indicating the strong coupling superconductivity. The electronic specific heat coefficient just above T sc is roughly estimated to be 100 AE 20 mJ=K 2 mol at 2.58 GPa, which is the same as g ¼ 120 AE 20 mJ=K 2 mol at ambient pressure.