TY - JOUR
T1 - Fermi surface and superconducting properties of non-centrosymmetric LaNiC 2
AU - Hirose, Yusuke
AU - Kishino, Toshihiko
AU - Sakaguchi, Jyunya
AU - Miura, Yasunao
AU - Honda, Fuminori
AU - Takeuchi, Tetsuya
AU - Yamamoto, Etsuji
AU - Haga, Yoshinori
AU - Harima, Hisatomo
AU - Settai, Rikio
AU - Onuki, Yoshichika
PY - 2012/11
Y1 - 2012/11
N2 - We succeeded in growing single crystals of LaNiC 2 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 LaNiC 2 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 2kOe.
AB - We succeeded in growing single crystals of LaNiC 2 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 LaNiC 2 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 2kOe.
KW - De Haas-van Alphen effect
KW - Energy band calculation
KW - Fermi surface
KW - LaNiC
KW - Non-centrosymmetric crystal structure
KW - Single crystal
KW - Specific heat
KW - Superconductivity
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U2 - 10.1143/JPSJ.81.113703
DO - 10.1143/JPSJ.81.113703
M3 - Article
AN - SCOPUS:84870163690
VL - 81
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 11
M1 - 113703
ER -