Evidence of point nodes in superconducting gap of borocarbide superconductor YNi2B2C

K. Kamata; K. Izawa; Y. Nakajima; Y. Matsuda; T. Watanabe; M. Nohara; H. Takagi; H. Takeya; K. Hirata; P. Thalmeier; K. Maki

doi:10.1016/S0921-4534(02)02719-3

Evidence of point nodes in superconducting gap of borocarbide superconductor YNi₂B₂C

K. Kamata, K. Izawa, Y. Nakajima, Y. Matsuda, T. Watanabe, M. Nohara, H. Takagi, H. Takeya, K. Hirata, P. Thalmeier, K. Maki

Research output: Contribution to journal › Conference article › peer-review

2 Citations (Scopus)

Abstract

In order to determine the superconducting gap structure of the borocarbide superconductor YNi₂B₂C, we have measured the angular variation of the c-axis thermal conductivity κ_zz in magnetic field rotated within the ab-planes. A clear fourfold symmetry with narrow cusps was observed in the angular variation of κ_zz. These results provide a strong evidence that the gap function has point nodes which are located along the a- and b-axes of the crystal.

Original language	English
Pages (from-to)	185-186
Number of pages	2
Journal	Physica C: Superconductivity and its applications
Volume	388-389
DOIs	https://doi.org/10.1016/S0921-4534(02)02719-3
Publication status	Published - May 1 2003
Externally published	Yes
Event	proceedings of the 23rd international conference on low temper - Hiroshima, Japan Duration: Aug 20 2002 → Aug 27 2002

Keywords

Borocarbides
Superconducting gap structure
Thermal conductivity

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

Access to Document

10.1016/S0921-4534(02)02719-3

Cite this

Evidence of point nodes in superconducting gap of borocarbide superconductor YNi₂B₂C. / Kamata, K.; Izawa, K.; Nakajima, Y.; Matsuda, Y.; Watanabe, T.; Nohara, M.; Takagi, H.; Takeya, H.; Hirata, K.; Thalmeier, P.; Maki, K.

In: Physica C: Superconductivity and its applications, Vol. 388-389, 01.05.2003, p. 185-186.

Research output: Contribution to journal › Conference article › peer-review

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AU - Kamata, K.

AU - Izawa, K.

AU - Nakajima, Y.

AU - Matsuda, Y.

AU - Watanabe, T.

AU - Nohara, M.

AU - Takagi, H.

AU - Takeya, H.

AU - Hirata, K.

AU - Thalmeier, P.

AU - Maki, K.

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AB - In order to determine the superconducting gap structure of the borocarbide superconductor YNi2B2C, we have measured the angular variation of the c-axis thermal conductivity κzz in magnetic field rotated within the ab-planes. A clear fourfold symmetry with narrow cusps was observed in the angular variation of κzz. These results provide a strong evidence that the gap function has point nodes which are located along the a- and b-axes of the crystal.

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KW - Superconducting gap structure

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