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  Evidence of d-wave superconductivity in K1-xNaxFe2As2 (x=0,0.1) single crystals from low-temperature specific-heat measurements

Abdel-Hafiez, M., Grinenko, V., Aswartham, S., Morozov, I., Roslova, M., Vakaliuk, O., et al. (2013). Evidence of d-wave superconductivity in K1-xNaxFe2As2 (x=0,0.1) single crystals from low-temperature specific-heat measurements. Physical Review B, 87(18): 180507, pp. 180507-1-180507-4. doi:10.1103/PhysRevB.87.180507.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0015-1EB8-4 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0015-1EB9-2
Genre: Journal Article

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 Creators:
Abdel-Hafiez, M., Author
Grinenko, V., Author
Aswartham, S., Author
Morozov, I., Author
Roslova, M., Author
Vakaliuk, O., Author
Johnston, S., Author
Efremov, D. V., Author
van den Brink, J., Author
Rosner, H.1, Author              
Kumar, M.2, Author              
Hess, C., Author
Wurmehl, S., Author
Wolter, A. U. B., Author
Büchner, B., Author
Green, E. L., Author
Wosnitza, J., Author
Vogt, P., Author
Reifenberger, A., Author
Enss, C., Author
Hempel, M., AuthorKlingeler, R., AuthorDrechsler, S. L., Author more..
Affiliations:
1Helge Rosner, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863450              
2Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863404              

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 Abstract: From the measurement and analysis of the specific heat of high-quality K1- xNaxFe2As2 single crystals we establish the presence of large T-2 contributions with coefficients alpha(sc) approximate to 30 mJ/mol K-3 at low T for both x = 0 and x = 0.1. Together with the observed root B behavior of the specific heat in the superconducting state both findings give evidence of d-wave superconductivity on almost all Fermi-surface sheets with an average gap amplitude of Delta(0) in the range of 0.4-0.8 meV. The derived Delta(0) and observed T-c agree well with the values calculated within Eliashberg theory, adopting a spin-fluctuation mediated pairing in the intermediate coupling regime.

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Language(s): eng - English
 Dates: 2013-05-28
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: eDoc: 668931
ISI: 000319653400002
DOI: 10.1103/PhysRevB.87.180507
 Degree: -

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Title: Physical Review B
Source Genre: Journal
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Pages: - Volume / Issue: 87 (18) Sequence Number: 180507 Start / End Page: 180507-1 - 180507-4 Identifier: ISSN: 1098-0121