Upper critical fields and two-band superconductivity in Sr1−xEux(Fe0.89Co0.11)2As2(x=0.20and0.46)

Autor:	Rongwei Hu, Vivien Zapf, M. M. Altarawneh, Sergey L. Bud'ko, C. H. Mielke, Paul C. Canfield, Eundeok Mun
Rok vydání:	2012
Předmět:	Physics Superconductivity Field (physics) Condensed matter physics Condensed Matter Physics Curvature Electronic Optical and Magnetic Materials Magnetic field Two band symbols.namesake Pauli exclusion principle Condensed Matter::Superconductivity symbols Penetration depth Anisotropy
Zdroj:	Physical Review B. 85
ISSN:	1550-235X 1098-0121
Popis:	The upper critical fields Hc2(T) of single crystals of Sr1-xEux(Fe₀.₈₉Co₀.₁₁)₂As₂ (x=0.20 and 0.46) were determined by radio-frequency penetration depth measurements in pulsed magnetic fields. Hc2(T) approaches the Pauli limiting field but shows an upward curvature with an enhancement from the orbital limited field, as inferred from the Werthamer-Helfand-Hohenberg theory. We discuss the temperature dependence of the upper critical fields and the decreasing anisotropy using a two-band BCS model.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::808aea45b29b5d6a9d211f774a634741 https://doi.org/10.1103/physrevb.85.064511 Zobrazit plný text záznamu