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Evidence of different conduction channels in bulk ZnO using f-MEMSA Analysis of transport properties

Published online by Cambridge University Press:  01 February 2011

Celine Tavares Chevalier ,
J. Rothman  and
G. Feuillet
Celine Tavares Chevalier
Affiliation:
[email protected], Cea Grenoble, DOPT, 17 rue des Martyrs, Grenoble, 38054, France, +33 4 38 78 47 23
J. Rothman
Affiliation:
[email protected], CEA – LETI, Minatec,, 17 rue des Martyrs,, Grenoble,, 38054, France
G. Feuillet
Affiliation:
[email protected], CEA – LETI, Minatec,, 17 rue des Martyrs,, Grenoble,, 38054,, France
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Abstract

The characterization of transport properties in Zn0 is known to be challenging, particularly due to surface (in the case of bulk) or interface (in the case of heteroepitaxial layers) conduction channels, which puts severe limitations on the interpretation of Hall Effect measurements. In this communication, we report on the study of transport properties of n-type ZnO bulk material using Hall mobility spectrum analysis estimated through the algorithm known as full Maximum Entropy Mobility Spectrum Analysis, f-MEMSA. The electrical properties of bulk Zn0 are measured using a Hall setup for applied magnetic fields µ0H in the range 0T-9T and for temperatures between 50K and 400K. The f-MEMSA analysis highlights the existence of two types of conduction channels in the considered ZnO substrate. We also show that surface conductive channel can be suppressed using appropriate annealing conditions.

Keywords

Hall effectelectrical propertiessurface reaction
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1035: Symposium L – Zinc Oxide and Related Materials–2007 , 2007 , 1035-L04-06
Copyright
Copyright © Materials Research Society 2008

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