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Variation of transition temperatures and residual resistivity ratio in vapor-grown FeSe

TitleVariation of transition temperatures and residual resistivity ratio in vapor-grown FeSe
Publication TypeJournal Article
Year of Publication2016
AuthorsBohmer, AE, Taufour, V, Straszheim, WE, Wolf, T, Canfield, PC
JournalPhysical Review B
Volume94
Pagination024526
Date Published07
Type of ArticleArticle
ISBN Number2469-9950
Accession NumberWOS:000381481300007
Keywordsphase, physics, superconductivity, transport
Abstract

The study of the iron-based superconductor FeSe has blossomed with the availability of high-quality single crystals, obtained through flux/vapor-transport growth techniques below the structural transformation temperature of its tetragonal phase, T approximate to 450 degrees C. Here, we report on the variation of sample morphology and properties due to small modifications in the growth conditions. A considerable variation of the superconducting transition temperature T-c, from 8.8 K to 3 K, which cannot be correlated with the sample composition, is observed. Instead, we point out a clear correlation between T-c and disorder, as measured by the residual resistivity ratio. Notably, the tetragonal-to-orthorhombic structural transition is also found to be quite strongly disorder dependent (T-s approximate to 72-90 K) and linearly correlated with T-c.

DOI10.1103/PhysRevB.94.024526
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Complex States

Alternate JournalPhys. Rev. B