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- Title
Thermoelectric Characterization of Electronic Properties of GaMnAs Nanowires.
- Authors
Wu, Phillip M.; Paschoal Jr, Waldomiro; Kumar, Sandeep; Borschel, Christian; Ronning, Carsten; Canali, Carlo M.; Samuelson, Lars; Pettersson, Håkan; Linke, Heiner
- Abstract
Nanowires with magnetic doping centers are an exciting candidate for the study of spin physics and proof-of-principle spintronics devices. The required heavy doping can be expected to have a significant impact on the nanowires' electron transport properties. Here, we use thermopower and conductance measurements for transport characterization of Ga0.95Mn0.05As nanowires over a broad temperature range. We determine the carrier type (holes) and concentration and find a sharp increase of the thermopower below temperatures of 120 K that can be qualitatively described by a hopping conduction model. However, the unusually large thermopower suggests that additional mechanisms must be considered as well.
- Subjects
THERMOELECTRICITY; ELECTRIC properties of nanowires; SPINTRONICS; ELECTRON spin; GALLIUM; ELECTRON transport; TEMPERATURE effect; THERMOELECTRIC power
- Publication
Journal of Nanotechnology, 2012, p1
- ISSN
1687-9503
- Publication type
Article
- DOI
10.1155/2012/480813