Large magnetoresistance of insulating silicon films with superconducting nanoprecipitates
We report on large negative and positive magnetoresistance in inhomogeneous, insulating Si:Ga films below a critical temperature of about 7 K. The magnetoresistance effect exceeds 300 % at temperatures below 3 K and fields of 8 T. The comparison of the transport properties of superconducting samples...
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doaj-b1c018eba9784e9d8184c80a8e52c7fb2020-11-25T01:03:47ZengAIP Publishing LLCAIP Advances2158-32262016-10-01610105203105203-910.1063/1.4964931017610ADVLarge magnetoresistance of insulating silicon films with superconducting nanoprecipitatesV. Heera0J. Fiedler1W. Skorupa2Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, GermanyHelmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, GermanyHelmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, GermanyWe report on large negative and positive magnetoresistance in inhomogeneous, insulating Si:Ga films below a critical temperature of about 7 K. The magnetoresistance effect exceeds 300 % at temperatures below 3 K and fields of 8 T. The comparison of the transport properties of superconducting samples with that of insulating ones reveals that the large magnetoresistance is associated with the appearance of local superconductivity. A simple phenomenological model based on localized Cooper pairs and hopping quasiparticles is able to describe the temperature and magnetic field dependence of the sheet resistance of such films.http://dx.doi.org/10.1063/1.4964931 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
V. Heera J. Fiedler W. Skorupa |
spellingShingle |
V. Heera J. Fiedler W. Skorupa Large magnetoresistance of insulating silicon films with superconducting nanoprecipitates AIP Advances |
author_facet |
V. Heera J. Fiedler W. Skorupa |
author_sort |
V. Heera |
title |
Large magnetoresistance of insulating silicon films with superconducting nanoprecipitates |
title_short |
Large magnetoresistance of insulating silicon films with superconducting nanoprecipitates |
title_full |
Large magnetoresistance of insulating silicon films with superconducting nanoprecipitates |
title_fullStr |
Large magnetoresistance of insulating silicon films with superconducting nanoprecipitates |
title_full_unstemmed |
Large magnetoresistance of insulating silicon films with superconducting nanoprecipitates |
title_sort |
large magnetoresistance of insulating silicon films with superconducting nanoprecipitates |
publisher |
AIP Publishing LLC |
series |
AIP Advances |
issn |
2158-3226 |
publishDate |
2016-10-01 |
description |
We report on large negative and positive magnetoresistance in inhomogeneous, insulating Si:Ga films below a critical temperature of about 7 K. The magnetoresistance effect exceeds 300 % at temperatures below 3 K and fields of 8 T. The comparison of the transport properties of superconducting samples with that of insulating ones reveals that the large magnetoresistance is associated with the appearance of local superconductivity. A simple phenomenological model based on localized Cooper pairs and hopping quasiparticles is able to describe the temperature and magnetic field dependence of the sheet resistance of such films. |
url |
http://dx.doi.org/10.1063/1.4964931 |
work_keys_str_mv |
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1725199407340584960 |