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TT: Fachverband Tiefe Temperaturen

TT 11: Superconductivity: Poster

TT 11.10: Poster

Monday, March 17, 2025, 15:00–18:00, P4

Disorder dependent properties of superconductors — •Marvin Zibula and Götz Seibold — Institut für Physik B-TU Cottbus-Senftenberg, Erich-Weinert Straße 1, 03046 Cottbus

We study the properties of disordered superconductors within the attractive Hubbard model and a disorder potential which interpolates between diluted impurities and Anderson-type disorder with a random potential at each lattice site. In the latter case, we reproduce the results from Ghosal et al. [1], corresponding to the formation of superconducting islands that are not correlated to the underlying charge distribution. However, such a correlation becomes effective upon reducing the impurity concentration. Our results are important for recent optical experiments related to the nonlinear first harmonic response which are more compatible with the diluted model.

[1] A.Ghosal, M.Randeria, N.Trivedi, Phys.Rev.B 65, 014501 (2001)

Keywords: Disordered Superconductors