Fermi Surface and Superconducting Properties of Non-centrosymmetric LaNiC2
スポンサーリンク
概要
- 論文の詳細を見る
We succeeded in growing single crystals of LaNiC2 with the non-centrosymmetric orthorhombic structure by the Czochralski method, and measured the electrical resistivity, de Haas--van Alphen effect, and specific heat to clarify the Fermi surface and superconducting properties. This compound has been studied from a viewpoint of the triplet superconducting pairing state. In the present experiment, we observed an ellipsoidal Fermi surface and a multiply-connected-pillar Fermi surface, which are split into two Fermi surfaces, reflecting the antisymmetric spin--orbit interaction based on the non-centrosymmetric crystal structure. The two ellipsoidal Fermi surfaces are split by 230 K, for example. The anisotropy of electrical resistivity and upper critical field H_{\text{c2}} in superconductivity are not large for three principal directions. From the low-temperature specific heat measurement, superconductivity in LaNiC2 is explained by the framework of the BCS-superconductivity, contrary to the above arguments. The upper critical field H_{\text{c2}}(0), which was obtained from the specific heat under magnetic fields, is about 2 kOe.
- 2012-11-15
著者
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SETTAI Rikio
Graduate School of Science, Osaka University
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Honda Fuminori
Graduate School Of Science Osaka University
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Yamamoto Etsuji
Advanced Science Research Center Japan Atomic Energy Agency
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Takeuchi Tetsuya
Low Temperature Center Osaka University
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Onuki Yoshichika
Graduate School Of Science Osaka University
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Harima Hisatomo
Graduate School Of Sciences Kobe University
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Sakaguchi Jyunya
Graduate School Shinshu University
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HAGA Yoshinori
Advance Science Research Center, Japan Atomic Energy Agency
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Hirose Yusuke
Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043
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KISHINO Toshihiko
Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
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Miura Yasunao
Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
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Harima Hisatomo
Graduate School of Science, Kobe University, Kobe 657-8501, Japan
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Sakaguchi Jyunya
Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
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Honda Fuminori
Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
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