Effect of interband interaction on isotope effect exponent of MgB2 superconductors

Pramana

P Changkanarth²  C Kumvongsa¹  A Burakorn²  P Udomsamuthirun1² 

[1] Department of Basic Science, School of Science, The University of the Thai Chamber of Commerce, Dindaeng, Bangkok 10400, Thailand$$;Department of Physics, Faculty of Science, Srinakharinwirot University, Bangkok 10110, Thailand$$

关键词: Isotope effect exponent;    superconductors;    interband interaction.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

The exact formula of 𝑇c's equation and the isotope effect exponent of two-band s-wave superconductors in the weak-coupling limit are derived by considering the influence of interband interaction. In each band, our model consists of two pairing interactions: the electron-phonon interaction and non-electron-phonon interaction. We find that the isotope effect exponent of MgB2, 𝛼 = 0.3 with 𝑇c ≈ 40 K can be found in the weak coupling regime and interband interaction of electron-phonon shows more effect on the isotope effect exponent than on the interband interaction of non-phonon.

【 授权许可】

Unknown