Fingerprints of a size-dependent crossover in the dimensionality of electronic conduction in Au-seeded Ge nanowires
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Published Version
Date
2016-11-02
Authors
Koleśnik-Gray, Maria M.
Collins, Gillian
Holmes, Justin D.
Krstić, Vojislav
Journal Title
Journal ISSN
Volume Title
Publisher
Beilstein-Institut
Published Version
Abstract
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.
Description
Keywords
Electrical transport , Germanium nanowires , Quasi-1D confinement , Screening length , VLS growth
Citation
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