Gap Function with Point Nodes in Borocarbide Superconductor [Formula presented]

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

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

To determine the superconducting gap function of [Formula presented], the [Formula presented]-axis thermal conductivity [Formula presented] was measured in [Formula presented] rotated in various directions. The angular variation of [Formula presented] in [Formula presented] rotated within the [Formula presented] plane shows a peculiar fourfold oscillation with narrow cusps. The amplitude of this fourfold oscillation becomes very small when [Formula presented] is rotated conically around the [Formula presented] axis with a tilt angle of 45°. These results provide the first compelling evidence that the gap function has point nodes located along the [Formula presented] and [Formula presented] axes. This unprecedented gap structure challenges the current view on the pairing mechanism.

Original languageEnglish
JournalPhysical Review Letters
Volume89
Issue number13
DOIs
Publication statusPublished - Jan 1 2002
Externally publishedYes

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oscillations
cusps
thermal conductivity

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Gap Function with Point Nodes in Borocarbide Superconductor [Formula presented] . / Izawa, K.; Kamata, K.; Nakajima, Y.; Matsuda, Y.; Watanabe, T.; Nohara, Minoru; Takagi, H.; Thalmeier, P.; Maki, K.

In: Physical Review Letters, Vol. 89, No. 13, 01.01.2002.

Research output: Contribution to journalArticle

Izawa, K, Kamata, K, Nakajima, Y, Matsuda, Y, Watanabe, T, Nohara, M, Takagi, H, Thalmeier, P & Maki, K 2002, 'Gap Function with Point Nodes in Borocarbide Superconductor [Formula presented] ', Physical Review Letters, vol. 89, no. 13. https://doi.org/10.1103/PhysRevLett.89.137006
Izawa, K. ; Kamata, K. ; Nakajima, Y. ; Matsuda, Y. ; Watanabe, T. ; Nohara, Minoru ; Takagi, H. ; Thalmeier, P. ; Maki, K. / Gap Function with Point Nodes in Borocarbide Superconductor [Formula presented] . In: Physical Review Letters. 2002 ; Vol. 89, No. 13.
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