Surface transport properties of Fe-based superconductors: The influence of degradation and inhomogeneity

Autor:	Plecenik, T., Gregor, M., Sobota, R., Truchly, M., Satrapinskyy, L., Kurth, F., Holzapfel, B., Iida, K., Kus, P., Plecenik, A.
Rok vydání:	2013
Předmět:	Condensed Matter - Superconductivity
Zdroj:	Appl. Phys. Lett. 103, 052601 (2013)
Druh dokumentu:	Working Paper
DOI:	10.1063/1.4816820
Popis:	Surface properties of Co-doped BaFe2As2 epitaxial superconducting thin films were inspected by X-ray photoelectron spectroscopy, scanning spreading resistance microscopy (SSRM), and point contact spectroscopy (PCS). It has been shown that surface of Fe-based superconductors degrades rapidly if being exposed to air, what results in suppression of gap-like structure on PCS spectra. Moreover, SSRM measurements revealed inhomogeneous surface conductivity, what is consistent with strong dependence of PCS spectra on contact position. Presented results suggest that fresh surface and small probing area should be assured for surface sensitive measurements like PCS to obtain intrinsic properties of Fe-based superconductors. Comment: 4 pages, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1307.7944 Zobrazit plný text záznamu View this record from Arxiv