Magnetoresistance anisotropy in amorphous superconducting thin films: Site-bond percolation approach
Year: 2015
Type: article
Abstract: 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.
Source: Physical Review B
Authors: Elkana Porat, Yigal Meir
Institution: Ben-Gurion University of the Negev
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funder: Israel Science Foundation
OpenAlex ID: W2263135331