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Specific heat investigation for line nodes in heavily overdoped Ba1-xKxFe2As2

TitleSpecific heat investigation for line nodes in heavily overdoped Ba1-xKxFe2As2
Publication TypeJournal Article
Year of Publication2015
AuthorsKim, JS, Stewart, GR, Liu, Y, Lograsso, TA
JournalPhysical Review B
Volume91
Pagination214506
Date Published06
Type of ArticleArticle
ISBN Number1098-0121
Accession NumberWOS:000355956100002
Keywordsd-wave, density-of-states, magnetic-field dependence, superconductors, temperature specific-heat, vortex
Abstract

= 2 mJ/mol K-3 being consistent with the data. This, together with the scaling, leaves open the possibility of extreme anisotropy in a nodeless larger gap, Delta(2), such that the scaling works for fields above 0.25-0.5 T (0.2-0.4 K in temperature units), where this is an estimate for the size of the deep minima in the Delta(2) similar to 20 - 25 K gap. Therefore, the location of the change from nodeless to nodal gaps between optimally doped and heavily overdoped Ba1-xKxFe2As2 based on the present work may be closer to the KFe2As2 end point than x = 0.91.

DOI10.1103/PhysRevB.91.214506
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