2D VAN HOVE SUPERCONDUCTORS WITH WEAK AND STRONG-COUPLINGS

Authors

  • F. Parvin Department of Physics, Rajshahi University, Rajshahi-6205, Bangladesh
  • A.K. M.A. Islam Department of Physics, Rajshahi University, Rajshahi-6205, Bangladesh
  • F. N. Islam Department of Physics, Rajshahi University, Rajshahi-6205, Bangladesh

Abstract

The critical temperature (Tc) and the isotope coefficient (α) of two-dimensional van Hove superconductors have been analyzed. The phonon induced superconductors with both weak and strong couplings are considered. For weak coupling, the variation of Tc and α as a function of average phonon frequency, ωD, for three sets of pairing potential, V, shows that α decreases at nearly same rate with the increase of ωD; but Tc increases with increasing ωD but at different rates for different V. For strong coupling, the variation of Tc and α shows that smaller band width produces desirable results that are consistent with observation.

References

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Published

06-07-2020

How to Cite

[1]
F. Parvin, A. M. Islam, and F. N. Islam, “2D VAN HOVE SUPERCONDUCTORS WITH WEAK AND STRONG-COUPLINGS”, The Nucleus, vol. 43, no. 1-4, pp. 149–152, Jul. 2020.

Issue

Vol. 43 No. 1-4 (2006)

Section

Articles