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| ID:
668931.1,
MPI für Chemische Physik fester Stoffe / publications 2013 |
| Evidence of d-wave superconductivity in K1-xNaxFe2As2 (x=0,0.1) single crystals from low-temperature specific-heat measurements |
| Authors: | Abdel-Hafiez, M.; Grinenko, V.; Aswartham, S.; Morozov, I.; Roslova, M.; Vakaliuk, O.; Johnston, S.; Efremov, D. V.; van den Brink, J.; Rosner, H.; Kumar, M.; Hess, C.; Wurmehl, S.; Wolter, A. U. B.; Büchner, B.; Green, E. L.; Wosnitza, J.; Vogt, P.; Reifenberger, A.; Enss, C.; Hempel, M.; Klingeler, R.; Drechsler, S. L. | | Language: | English | | Date of Publication (YYYY-MM-DD): | 2013-05-28 | | Title of Journal: | Physical Review B | | Volume: | 87 | | Issue / Number: | 18 | | Start Page: | 180507-1 | | End Page: | 180507-4 | | Sequence Number of Article: | 180507 | | Review Status: | not specified | | Audience: | Not Specified | | Abstract / Description: | 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. | | External Publication Status: | published | | Document Type: | Article |
| Communicated by: | Ina Werner | | Affiliations: | MPI für chemische Physik fester Stoffe
| | Identifiers: | ISI:000319653400002 [ID No:1]
ISSN:1098-0121 [ID No:2]
DOI:10.1103/PhysRevB.87.180507 | |
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