Doping effects of Co, Ni, and Cu in FeTe0.65Se0.35 single crystals
arXiv:1205.6295 · doi:10.12693/APhysPolA.121.816
Abstract
The resistivity, magnetoresistance, and magnetic susceptibility are measured in single crystals of FeTe0.65Se0.35 with Cu, Ni, and Co substitutions for Fe. The crystals are grown by Bridgman's method. The resistivity measurements show that superconductivity disappears with the rate which correlates with the nominal valence of the impurity. From magnetoresistance we evaluate doping effect on the basic superconducting parameters, such as upper critical field and coherence length. We find indications that doping leads to two component superconducting behavior, possibly because of local charge depression around impurities.
4 pages, 4 figures, 1 table, Proceedings of the XV-th National School "Hundred Years of Superconductivity", Kazimierz Dolny, October 9-13, 2011
References in corpus (7)
- To What Extent Iron-Pnictide New Superconductors Have Been Clarified: A Progress Report
- Bulk Superconductivity at 14 K in Single Crystals of Fe1+yTexSe1-x
- Effects of magnetism and doping on the electron-phonon coupling in BaFeAs
- Growth conditions, structure, and superconductivity of pure and metal-doped FeTe1-xSex single crystals
- Charge doping-induced quasiparticle scattering in iron-pnictide superconductors as probed by vortex pinning
- Comment on " Low-Lying Quasiparticle States and Hidden Collective Charge Instabilities in Parent Cobaltate Superconductors"
- Disorder-driven electronic localization and phase separation in superconducting Fe1+yTe0.5Se0.5 single crystals