Title:	Temperature-dependent electron mobility in InAs nanowires
Authors:	Gupta, Nupur Song, Yipu Holloway, Gregory W. Sinha, Urbasi Haapamaki, Chris M. LaPierre, Ray R. Baugh, Jonathan
Issue Date:	Jun-2013
Publisher:	IOP Publishing
Citation:	Nanotechnology, 2013, Vol.24, 225202
Abstract:	Effective electron mobilities are obtained by transport measurements on InAs nanowire field-effect transistors at temperatures ranging from 10 to 200 K. The mobility increases with temperatures below ~30–50 K, and then decreases with temperatures above 50 K, consistent with other reports. The magnitude and temperature dependence of the observed mobility can be explained by Coulomb scattering from ionized surface states at typical densities. The behaviour above 50 K is ascribed to the thermally activated increase in the number of scatterers, although nanoscale confinement also plays a role as higher radial subbands are populated, leading to interband scattering and a shift of the carrier distribution closer to the surface. Scattering rate calculations using finite-element simulations of the nanowire transistor confirm that these mechanisms are able to explain the data.
Description:	Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)
URI:	http://hdl.handle.net/2289/5571
ISSN:	0957-4484 1361-6528 (online)
Alternative Location:	http://arxiv.org/abs/1210.3665 http://dx.doi.org/10.1088/0957-4484/24/22/225202
Copyright:	2013 IOP Publishing Ltd.
Appears in Collections:	Research Papers (LAMP)

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