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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Main Authors:	V. Heera, J. Fiedler, W. Skorupa
Format:	Article
Language:	English
Published:	AIP Publishing LLC 2016-10-01
Series:	AIP Advances
Online Access:	http://dx.doi.org/10.1063/1.4964931

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spelling	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	AT vheera largemagnetoresistanceofinsulatingsiliconfilmswithsuperconductingnanoprecipitates AT jfiedler largemagnetoresistanceofinsulatingsiliconfilmswithsuperconductingnanoprecipitates AT wskorupa largemagnetoresistanceofinsulatingsiliconfilmswithsuperconductingnanoprecipitates
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Large magnetoresistance of insulating silicon films with superconducting nanoprecipitates

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