Nodal structures of heavy fermion superconductors probed by the specific-heat measurements in magnetic fields

Toshiro Sakakibara*, Atsushi Yamada, Jeroen Custers, Kazuhiro Yano, Takashi Tayama, Hidekazu Aoki, Kazushige Machida

*この論文の責任著者

研究成果: ジャーナルへの寄稿学術論文査読

68 被引用数 (Scopus)

抄録

Heavy electron superconductors mostly have anisotropic gap function which vanishes (has nodes) for certain directions in the momentum space. Since the nodal structure is closely related to the pairing mechanism, its experimental determination is very important. In anisotropic superconductors, low energy spectrum of the quasiparticles in the vortex state much depends on the nodal structure. In particular, the electronic specific heat has been demonstrated to exhibit the characteristic dependence on the angle between the field and the nodal direction, thereby the nodal structure can be probed experimentally. In this contribution, we present our recent experimental results on the field-orientation dependence of the specific heat on f electron superconductors CeRu 2, CeCoIn 5, PrOs 4Sb 12, and URu 2Si 2, and discuss their gap structures.

本文言語英語
論文番号051004
ジャーナルJournal of the Physical Society of Japan
76
5
DOI
出版ステータス出版済み - 2007/05

ASJC Scopus 主題領域

  • 物理学および天文学一般

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