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Anisotropic two-band $\alpha$-model and its application to layered chalcogenide superconductor NbSe2

by Jiang-Ning Zhang , Guo Wang , Tian-Yi Han, Hai Huang

Submission summary

Authors (as registered SciPost users): Tianyi Han
Submission information
Preprint Link: scipost_202412_00031v1  (pdf)
Date submitted: 2024-12-17 15:47
Submitted by: Han, Tianyi
Submitted to: SciPost Physics
Ontological classification
Academic field: Physics
Specialties:
  • Condensed Matter Physics - Theory
Approaches: Theoretical, Phenomenological

Abstract

The generalized $\alpha$-model for anisotropic two-band superconductivity is consistently constructed with the consideration of weak interband electron-electron interaction. Tailored from the two-band BCS theory, the developed framework can be applied to investigate thermodynamic properties of intraband strong-coupling superconductors. Accordingly, we perform a calculation on the temperature dependence of specific heat and obtain an analytic expression for specific heat jump at the superconducting critical temperature. Given the low-temperature superconducting gaps from experimental measurement, all of our theoretical results can fit the specific heat data of the layered two-band superconductor NbSe2 well.

Author indications on fulfilling journal expectations

  • Provide a novel and synergetic link between different research areas.
  • Open a new pathway in an existing or a new research direction, with clear potential for multi-pronged follow-up work
  • Detail a groundbreaking theoretical/experimental/computational discovery
  • Present a breakthrough on a previously-identified and long-standing research stumbling block
Current status:
In refereeing

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