Fingerprints of a size-dependent crossover in the dimensionality of electronic conduction in Au-seeded Ge nanowires
Koleśnik-Gray, Maria M.
Holmes, Justin D.
We studied the electrical transport properties of Au-seeded germanium nanowires with radii ranging from 11 to 80 nm at ambient conditions. We found a non-trivial dependence of the electrical conductivity, mobility and carrier density on the radius size. In particular, two regimes were identified for large (lightly doped) and small (stronger doped) nanowires in which the charge-carrier drift is dominated by electron-phonon and ionized-impurity scattering, respectively. This goes in hand with the finding that the electrostatic properties for radii below ca. 37 nm have quasi one-dimensional character as reflected by the extracted screening lengths.
Electrical transport , Germanium nanowires , Quasi-1D confinement , Screening length , VLS growth
Koleśnik-Gray, M., Collins, G., Holmes, J. D. & Krstić, V. (2016) ‘Fingerprints of a size-dependent crossover in the dimensionality of electronic conduction in Au-seeded Ge nanowires’, Beilstein Journal of Nanotechnology, 7, pp. 1574-1578. doi: 10.3762/bjnano.7.151
© 2016 Koleśnik-Gray et al.; licensee Beilstein-Institut. This is an Open Access article under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The license is subject to the Beilstein Journal of Nanotechnology terms and conditions: (http://www.beilstein-journals.org/bjnano). The definitive version of this article is the electronic one which can be found at: doi:10.3762/bjnano.7.151