Variable range hopping conduction of the Mott type, where the magnetoresistance follows the relation , is observed in n-type CuInSe2 below 20 K at different magnetic field values up to 35 T. The field dependence of the localization temperature and localization length ξ can be explained with the existing theoretical models but only up to 10 T. In the high field regime, above 10 T, the magnetoresistance shows a tendency to saturate. However, excellent agreement with the theory of the variation of the hopping parameters and ξ with B is found up to 35 T from the analysis of the interpolated magnetoresistance data obtained from the linearly extrapolated plot of against . This suggests that the departure of and ξ from the expected variation with B above 10 T is due to the effect of saturation of the magnetoresistance whose origin is not yet clear.
La conduction par saut à distance variable de type Mott où la magnétorsistance suit la relation , est observée dans n-CuInSe2 en dessous de 20 K pour un champ magnétique B allant jusqu'à 35 T. L'effet de B sut la température caractéristique et sur la longueur de localisation ξ est expliqué à l'aide des modèles théoriques existants mais pour B< 10 T. Pour B> 10 T, la magnétorésistance présente un comportement de saturation. Cependant, les variations de et ξ avec B sont en accord avec la théorie lorsqu'on considère les données obtenues par extrapolation des courbes en fonction de . Ceci suggère que le désaccord observé au dessus de 10 T est lié à la saturation de la magnétoprésistance. L'origine de cette saturation n'est pas encore claire.
Accepted:
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Mots-clés : Semi-conducteur, Saut à distance variable, Magnétorsistance
Lahcen Essaleh 1; Syed M. Wasim 2; Jean Galibert 3
@article{CRPHYS_2007__8_7-8_942_0, author = {Lahcen Essaleh and Syed M. Wasim and Jean Galibert}, title = {Effect of the high magnetic field on the localization length in n-type {Cooper} {Indium} diselenide}, journal = {Comptes Rendus. Physique}, pages = {942--947}, publisher = {Elsevier}, volume = {8}, number = {7-8}, year = {2007}, doi = {10.1016/j.crhy.2007.07.001}, language = {en}, }
TY - JOUR AU - Lahcen Essaleh AU - Syed M. Wasim AU - Jean Galibert TI - Effect of the high magnetic field on the localization length in n-type Cooper Indium diselenide JO - Comptes Rendus. Physique PY - 2007 SP - 942 EP - 947 VL - 8 IS - 7-8 PB - Elsevier DO - 10.1016/j.crhy.2007.07.001 LA - en ID - CRPHYS_2007__8_7-8_942_0 ER -
%0 Journal Article %A Lahcen Essaleh %A Syed M. Wasim %A Jean Galibert %T Effect of the high magnetic field on the localization length in n-type Cooper Indium diselenide %J Comptes Rendus. Physique %D 2007 %P 942-947 %V 8 %N 7-8 %I Elsevier %R 10.1016/j.crhy.2007.07.001 %G en %F CRPHYS_2007__8_7-8_942_0
Lahcen Essaleh; Syed M. Wasim; Jean Galibert. Effect of the high magnetic field on the localization length in n-type Cooper Indium diselenide. Comptes Rendus. Physique, Neutron scattering: a comprehensive tool for condensed matter research, Volume 8 (2007) no. 7-8, pp. 942-947. doi : 10.1016/j.crhy.2007.07.001. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2007.07.001/
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