학술논문
Multigap Superconductivity in GdFeAsO$_{0.88}$ Evidenced by SnS-Andreev Spectroscopy
Document Type
Working Paper
Author
Source
J. Supercond. Novel Magn. 26, 2661 (2013)
Subject
Language
Abstract
Using intrinsic multiple Andreev reflection effect (IMARE) spectroscopy we studied superconducting properties of nearly optimal oxygen-deficient GdFeAsO$_{0.88}$ polycrystalline samples (bulk critical temperatures $T_C^{bulk} = 49 \div 52$\,K). Temperature dependences for two superconducting gaps $\Delta_{L,S}(T)$ ($T_C^{local} = 48 \div 50$\,K) have been measured in the range from 4.2 to 50\,K. The $\Delta_{L,S}(T)$ dependences were found to deviate from the BCS-like function; this suggests an importance of the $k$-space (internal) proximity effect between the two condensates.
Comment: 4 pages, 3 figures. Submitted to J. Supercond. Novel Magn. (Superstripes 2012 Proceedings)
Comment: 4 pages, 3 figures. Submitted to J. Supercond. Novel Magn. (Superstripes 2012 Proceedings)