Magnetoresistance anisotropy in amorphous superconducting thin films: Site-bond percolation approach

Elkana Porat and Yigal Meir
Phys. Rev. B 92, 024509 – Published 13 July 2015


Recent measurements of the magnetoresistance (MR) of amorphous superconducting thin films in tilted magnetic fields have displayed several surprising experimental details, in particular, a strong dependence of the MR on the field angle at low magnetic fields, which diminishes and then changes sign at large fields. Using a generalized site-bond percolation model, which takes into account both orbital and Zeeman effects of the magnetic field, we show that the resulting MR curves reproduce the main experimental features. Such measurements, accompanied by the corresponding theory, may be crucial in pinpointing the correct theory of the superconductor-insulator transition and of the MR peak in thin disordered films.

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  • Received 22 October 2014


©2015 American Physical Society

Authors & Affiliations

Elkana Porat and Yigal Meir,*

  • Department of Physics, Ben-Gurion University, Beer Sheva 84105, Israel

  • *

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Vol. 92, Iss. 2 — 1 July 2015

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