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Enhanced Eshelby twist on thin wurtzite InP nanowires and measurement of local crystal rotation

By L.H.G. Tizei, A. Craven, L.F. Zagonel, M. Tence, O. Stephan, T. Chiaramonte, M.A. Cotta and D. Ugarte

Abstract

We have performed a detailed study of the lattice distortions of InP wurtzite nanowires containing an axial screw dislocation. Eshelby predicted that this kind of system should show a crystal rotation due to the dislocation induced torque. We have measured the twisting rate and the dislocation Burgers vector on individual wires, revealing that nanowires with a 10-nm radius have a twist up to 100% larger than estimated from elasticity theory. The strain induced by the deformation has a Mexican-hat-like geometry, which may create a tube-like potential well for carriers

Topics: QC
Publisher: American Physical Society
Year: 2011
OAI identifier: oai:eprints.gla.ac.uk:58212
Provided by: Enlighten

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