Journal
PHYSICS-USPEKHI
Volume 59, Issue 12, Pages 1211-1240Publisher
TURPION LTD
DOI: 10.3367/UFNe.2016.07.037863
Keywords
unconventional superconductors; iron pnictides; iron chalcogenides; impurity scattering
Categories
Funding
- RFBR [16-02-00098]
- Government Support of the Leading Scientific Schools of the Russian Federation [NSh-7559.2016.2]
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Disorder - impurities and defects violating the ideal long-range order - is always present in solids. It can result in interesting and sometimes unexpected effects in multiband superconductors, especially if the superconductivity is unconventional, thus having symmetry other than the usual s-wave. This paper uses the examples of iron-based pnictides and chalcogenides to examine how both nonmagnetic and magnetic impurities affect superconducting states with s(+/-) and s(++) order parameters. We show that disorder causes the transition between s(+/-) and s(++) states and examine what observable effects this transition can produce.
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