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Interplay of order parameters in an $$s+d$$ s + d two-band superconducting model

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  • Zhixu Wang

    (University of Science and Technology Beijing)

  • Qiang Gu

    (University of Science and Technology Beijing)

Abstract

We extended the $$s+s$$ s + s two-band superconducting model proposed by Suhl et al. and Moskalenko to the $$s+d$$ s + d case and investigated the interplay between different superconducting order parameters. Unlike the $$s+s$$ s + s 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 $$s+d$$ s + d 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. Graphical abstract

Suggested Citation

  • Zhixu Wang & Qiang Gu, 2025. "Interplay of order parameters in an $$s+d$$ s + d two-band superconducting model," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 98(7), pages 1-6, July.
    • Handle: RePEc:spr:eurphb:v:98:y:2025:i:7:d:10.1140_epjb_s10051-025-01000-6
    DOI: 10.1140/epjb/s10051-025-01000-6
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