| Issue |
EPL
Volume 88, Number 1, October 2009
|
|
|---|---|---|
| Article Number | 17009 | |
| Number of page(s) | 5 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/88/17009 | |
| 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
Received:
25
August
2009
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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