2012年11月
Fermi Surface and Superconducting Properties of Non-centrosymmetric LaNiC2
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
- 巻
- 81
- 号
- 11
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1143/JPSJ.81.113703
- 出版者・発行元
- PHYSICAL SOC JAPAN
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-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-c2(0), which was obtained from the specific heat under magnetic fields, is about 2 kOe.
- リンク情報
- ID情報
-
- DOI : 10.1143/JPSJ.81.113703
- ISSN : 0031-9015
- Web of Science ID : WOS:000310509600006