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Electronic band structure and momentum dependence of the superconducting gap in (Ca, Na)Fe2As2 from angle-resolved photoemission spectroscopy
D. V. Evtushinsky, V. B. Zabolotnyy, L. Harnagea +10
Electronic structure of newly synthesized single crystals of calcium iron arsenide doped with sodium with Tc ranging from 33 to 14 K has been determined by angle-resolved photoemis…
Observation of charge accumulation and onsite Coulomb repulsion at transition metal impurities in the iron pnictides
R. Kraus, V. Bisogni, L. Harnagea +7
We report a combined valence band photoemission and Auger spectroscopy study of single crystalline Ca(Fe,Co)2As2 and Ba(Fe,TM)2As2 with TM=Ni or Cu. The valence band photoemission…
Strong Competition of Superconducting and Magnetic Order Parameters in Ba1-xNaxFe2As2
Hemke Maeter, Gwendolyne Pascua, Hubertus Luetkens +11
We study the interplay of magnetic and superconducting order in single crystalline hole doped Ba1-xNaxFe2As2 using muon spin relaxation. We find microscopic coexistence of magnetic…
Disordered magnetism in superconducting KFe2As2 single crystals
V. Grinenko, S. -L. Drechsler, M. Abdel-Hafiez +10
High-quality KFe2As2 (K122) single crystals synthesized by different techniques have been studied by magnetization and specific heat (SH) measurements. There are 2 types of samples…
Evidence for a vortex-glass transition in superconducting Ba(FeCo)As
G. Prando, R. Giraud, S. Aswartham +6
Measurements of magneto-resistivity and magnetic susceptibility were performed on single crystals of superconducting Ba(FeCo)As close to the conditions…
Flux jumps and vortex pinning in BaNaFeAs single crystals
A. K. Pramanik, S. Aswartham, A. U. B. Wolter +3
In this work we present the results of the bulk magnetization measurements in a superconducting state of single crystals of BaNaFeAs. The isothermal magne…