Current jets, disorder, and linear magnetoresistance in the silver chalcogenides.
Phys Rev Lett
; 95(18): 186603, 2005 Oct 28.
Article
em En
| MEDLINE
| ID: mdl-16383932
ABSTRACT
The inhomogeneous distribution of excess or deficient silver atoms lies behind the large and linear transverse magnetoresistance displayed by Ag2+/-delta Se and Ag2+/-delta, introducing spatial conductivity fluctuations with length scales independent of the cyclotron radius. We report a negative, nonsaturating longitudinal magnetoresistance up to at least 60 T, which becomes most negative where the bands cross and the effect of conductivity fluctuations is most acute. Thinning samples down to 10 microm suppresses the negative response, revealing the essential length scale in the problem and paving the way for designer magnetoresistive devices.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Phys Rev Lett
Ano de publicação:
2005
Tipo de documento:
Article
País de afiliação:
Estados Unidos