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Anisotropic thermodynamic and transport properties of single-crystalline CaKFe4As4

TitleAnisotropic thermodynamic and transport properties of single-crystalline CaKFe4As4
Publication TypeJournal Article
Year of Publication2016
AuthorsMeier, WR, Kong, T, Kaluarachchi, US, Taufour, V, Jo, NH, Drachuck, G, Bohmer, AE, Saunders, SM, Sapkota, A, Kreyssig, A, Tanatar, MA, Prozorov, R, Goldman, AI, Balakirev, FF, Gurevich, A, Bud'ko, SL, Canfield, PC
JournalPhysical Review B
Volume94
Pagination064501
Date Published08
Type of ArticleArticle
ISBN Number2469-9950
Accession NumberWOS:000380949800009
KeywordsCaFe2As2, fe-based superconductors, field, growth, magnetization, physics, pressure, susceptibility
Abstract

on a generalized, Fe-based superconductor, phase diagram. The anisotropic superconducting upper critical field, H-c2(T), of CaKFe4As4 was determined up to 630 kOe. The anisotropy parameter. (T) = H-c2(perpendicular to)/H-c2(parallel to), for H applied perpendicular and parallel to the c axis, decreases from similar or equal to 2.5 at T-c to similar or equal to 1.5 at 25 K, which can be explained by interplay of paramagnetic pair breaking and orbital effects. The slopes of dH(c2)(parallel to)/dT similar or equal to -44 kOe/K and dH(c2)(perpendicular to)/dT similar or equal to -109 kOe/K at T-c yield an electron mass anisotropy of m(perpendicular to)/m(parallel to) similar or equal to 1/6 and short Ginzburg-Landau coherence lengths xi(parallel to) (0) similar or equal to 5.8 angstrom and xi(parallel to) (0) similar or equal to 14.3 angstrom. The value of H-c2(perpendicular to) (0) can be extrapolated to similar or equal to 920 kOe, well above the BCS paramagnetic limit.

DOI10.1103/PhysRevB.94.064501
Custom 1

Complex States

Custom 2

Correlations

Alternate JournalPhys. Rev. B