Volume 88, Number 1, October 2009
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||26 October 2009|
Magnetic impurities in the two-band s-wave superconductors
Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Accepted: 28 September 2009
We investigate the effects of magnetic impurities in a superconducting state with s pairing symmetry. Within a two-band model, we find that the intra-band magnetic scattering serves as a pair breaker while the inter-band magnetic scattering preserves pairing and hardly affects transition temperature in the Born limit. We also show that the same physics can persist beyond the weak-scattering region. Our results coincide with recent experimental measurements in iron-based superconductors and thus provides an indirect evidence of the possible s pairing symmetry in these materials.
PACS: 74.20.-z – Theories and models of superconducting state / 74.62.Dh – Effects of crystal defects, doping and substitution
© EPLA, 2009
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