Phase diagram of dirty two-band superconductors and observability of impurity-induced s + i s state
Silaev, M., Garaud, J., & Babaev, E. (2017). Phase diagram of dirty two-band superconductors and observability of impurity-induced s + i s state. Physical Review B, 95(2), 024517. https://doi.org/10.1103/PhysRevB.95.024517
Julkaistu sarjassa
Physical Review BPäivämäärä
2017Tekijänoikeudet
© 2017 American Physical Society. Published in this repository with the kind permission of the publisher.
We investigate the phase diagram of dirty two-band superconductors. This paper primarily focuses on the
properties and observability of the time-reversal symmetry-breaking s + is superconducting states, which can be
generated in two-band superconductors by interband impurity scattering. We show that such states can appear in
two distinct ways. First, according to a previously discussed scenario, the s + is state can form as an intermediate
phase at the impurity-driven crossover between s± and s++ states. We show that there is a second scenario where
domains of the s + is state exists in the form of an isolated dome inside the s± domain, completely detached from
the transition between s± and s++ states. We demonstrate that in both cases the s + is state generated by impurity
scattering exists in an extremely small interval of impurity concentrations. Although this likely precludes direct
experimental observation of the s + is state formation due to this mechanism, this physics leads to the appearance
of a region inside both the s± and s++ domains with unusual properties due to softening of normal modes.
...
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American Physical SocietyISSN Hae Julkaisufoorumista
2469-9950Asiasanat
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https://converis.jyu.fi/converis/portal/detail/Publication/26549235
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