Electrical transport in C-doped GaAs nanowires: surface effects

The resistivity and mobility of carbon-doped GaAs nanowires have been studied for different doping concentrations. Surface effects have been evaluated by comparing unpassivated with passivated nanowires. We directly see the influence of the surface: the pinning of the Fermi level and the consequent existence of a depletion region lead to an increase of the mobility up to 30 cm(2)/Vs for doping concentrations lower than 3 x 10(18) cm(-3). Electron beam induced current measurements show that the minority carrier diffusion path can be as high as 190 nm for passivated nanowires. ((c) 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)


Published in:
Physica Status Solidi-Rapid Research Letters, 7, 10, 890-893
Year:
2013
Publisher:
Weinheim, Wiley-Blackwell
ISSN:
1862-6254
Keywords:
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 Record created 2014-01-09, last modified 2018-09-13

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