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  Gap Function with Point Nodes in Borocarbide Superconductor YNi2B2C

Izawa, K., Kamata, K., Nakajima, Y., Matsuda, Y., Watanabe, T., Nohara, M., et al. (2002). Gap Function with Point Nodes in Borocarbide Superconductor YNi2B2C. Physical Review Letters, 89(13): 137006, pp. 137006-137006. doi:10.1103/PhysRevLett.89.137006.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0015-30FF-5 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0017-FF28-2
Genre: Journal Article

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 Creators:
Izawa, K., Author
Kamata, K., Author
Nakajima, Y., Author
Matsuda, Y., Author
Watanabe, T., Author
Nohara, M., Author
Takagi, H., Author
Thalmeier, P.1, Author              
Maki, K.2, Author              
Affiliations:
1Peter Thalmeier, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863457              
2Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863404              

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 Abstract: To determine the superconducting gap function of YNi2B2C, the c-axis thermal conductivity kappa(zz) was measured in H rotated in various directions. The angular variation of kappa(zz) in H rotated within the ab plane shows a peculiar fourfold oscillation with narrow cusps. The amplitude of this fourfold oscillation becomes very small when H is rotated conically around the c axis with a tilt angle of 45degrees. These results provide the first compelling evidence that the gap function has point nodes located along the a and b axes. This unprecedented gap structure challenges the current view on the pairing mechanism.

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Language(s): eng - English
 Dates: 2002-09-23
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: eDoc: 17437
ISI: 000178071800047
DOI: 10.1103/PhysRevLett.89.137006
 Degree: -

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Title: Physical Review Letters
  Alternative Title : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: -
Pages: - Volume / Issue: 89 (13) Sequence Number: 137006 Start / End Page: 137006 - 137006 Identifier: ISSN: 0031-9007