https://doi.org/10.1140/epjb/s10051-025-01000-6
Regular Article - Solid State and Materials
Interplay of order parameters in an 
two-band superconducting model
Department of Physics, Institute of Theoretical Physics, University of Science and Technology Beijing, 10083, Beijing, China
Received:
5
March
2025
Accepted:
7
July
2025
Published online:
15
July
2025
We extended the 
two-band superconducting model proposed by Suhl et al. and Moskalenko to the case and investigated the interplay between different superconducting order parameters. Unlike the model in which the two s-wave order parameters are mutuality enhanced and disappear at the same transition temperature, we found that the d-wave order parameter is apparently suppressed by the s-wave pairing in the two-band model. More over, the s- and d-wave order parameters usually disappear at different temperatures, implying that two separated phase transitions occur. The two phase transitions can be further confirmed by calculating the specific heat.
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© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2025
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
