title: Temperature-dependent electron mobility in InAs nanowires.
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.
authors: Department of Physics and Astronomy, University of Waterloo, 200 University Avenue W., Waterloo, ON, Canada.
authors: Nupur
authors: N
authors: Gupta
authors: Yipu
authors: Y
authors: Song
authors: Gregory W
authors: GW
authors: Holloway
authors: Urbasi
authors: U
authors: Sinha
authors: Chris M
authors: CM
authors: Haapamaki
authors: Ray R
authors: RR
authors: Lapierre
authors: Jonathan
authors: J
authors: Baugh