Temperature-Dependent s± ↔ s++ Transitions in the Multiband Model for Fe-Based Superconductors with Impurities
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036 Krasnoyarsk, Russia
Donostia International Physics Center, 20018 Donostia-San Sebastian, Spain
P.N. Lebedev Physical Institute RAS, 119991 Moscow, Russia
Author to whom correspondence should be addressed.
Received: 30 June 2018 / Revised: 1 August 2018 / Accepted: 3 August 2018 / Published: 6 August 2018
We study the dependence of the superconducting gaps on both the disorder and the temperature within the two-band model for iron-based materials. In the clean limit, the system is in the
state with sign-changing gaps. Scattering by nonmagnetic impurities leads to the change of the sign of the smaller gap, resulting in a transition from the
state with the sign-preserving gaps. We show here that the transition is temperature-dependent. Thus, there is a line of
transition in the temperature–disorder phase diagram. There is a narrow range of impurity scattering rates, where the disorder-induced
transition occurs at low temperatures, but then the low-temperature
state transforms back to the
state at higher temperatures. With increasing impurity scattering rate, the temperature of such
transition shifts to the critical temperature
, and only the
state is left for higher amounts of disorder.
This is an open access article distributed under the Creative Commons Attribution License
which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
Share & Cite This Article
MDPI and ACS Style
Shestakov, V.A.; Korshunov, M.M.; Dolgov, O.V. Temperature-Dependent s± ↔ s++ Transitions in the Multiband Model for Fe-Based Superconductors with Impurities. Symmetry 2018, 10, 323.
Shestakov VA, Korshunov MM, Dolgov OV. Temperature-Dependent s± ↔ s++ Transitions in the Multiband Model for Fe-Based Superconductors with Impurities. Symmetry. 2018; 10(8):323.
Shestakov, V. A.; Korshunov, M. M.; Dolgov, O. V. 2018. "Temperature-Dependent s± ↔ s++ Transitions in the Multiband Model for Fe-Based Superconductors with Impurities." Symmetry 10, no. 8: 323.
Show more citation formats
Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.
[Return to top]
For more information on the journal statistics, click here
Multiple requests from the same IP address are counted as one view.