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Combined effects of Sr substitution and pressure on the ground states in CaFe2As2

TitleCombined effects of Sr substitution and pressure on the ground states in CaFe2As2
Publication TypeJournal Article
Year of Publication2016
AuthorsKnoner, S, Gati, E, Kohler, S, Wolf, B, Tutsch, U, Ran, S, Torikachvili, MS, Bud'ko, SL, Canfield, PC, Lang, M
JournalPhysical Review B
Volume94
Pagination144513
Date Published10
Type of ArticleArticle
ISBN Number2469-9950
Accession NumberWOS:000386096200007
Keywordsgrowth, physics, single-crystals
Abstract

ibility of separating the two phase lines, which intersect already at elevated temperatures for x = 0 and low Sr concentration levels. For x = 0.177, we find strong evidence that both phases remain separated down to the lowest temperature and that a zero-resistance state emerges in this intermediate pressure window. This observation indicates that Sr substitution combined with hydrostatic pressure provides another route for stabilizing superconductivity in CaFe2As2. Our results are consistent with the notion that (i) preserving the fluctuations associated with the structural-magnetic transition to low temperatures is vital for superconductivity to form in this material and that (ii) the nonmagnetic collapsed tetragonal phase is detrimental for superconductivity.

DOI10.1103/PhysRevB.94.144513
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Complex States

Alternate JournalPhys. Rev. B