Thermoelectric Characterization of Electronic Properties of GaMnAs Nanowires
Keyword(s):
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.
2005 ◽
Vol 23
(4)
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pp. 1527
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2004 ◽
Vol 54
(S4)
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pp. 323-326
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2008 ◽
Vol 55
(2)
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pp. 649-654
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Keyword(s):
1996 ◽
Vol 65
(1)
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pp. 114-123
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