Impact of Electrical Current on Single GaAs Nanowire Structure
نویسندگان
چکیده
The impact of electrical current on the structure single free-standing Be-doped GaAs nanowires grown a Si 111 substrate is investigated. Single have been structurally analyzed by X-ray nanodiffraction using synchrotron radiation before and after application an current. conductivity measurements in their as-grown geometry realized via W-probes installed inside dual-beam focused ion beam/scanning electron microscopy chamber. Comparing reciprocal space maps Bragg reflection, extracted perpendicular to nanowire growth axis measurement, structural evidenced, including deformation hexagonal cross section, tilting, bending with respect normal. For densities below 30 A mm−2, induced changes are negligible. However, for density 347 diffraction pattern completely distorted. mean section illuminated volume reconstructed from Interestingly, elongation two pairs opposing side facets accompanied shrinkage third pair found. variations diameter, as well tilt bending, confirmed scanning microscopy. To explain these findings, material melting due Joule heating during voltage/current anisotropic deformations W-probe suggested.
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ژورنال
عنوان ژورنال: Physica Status Solidi B-basic Solid State Physics
سال: 2021
ISSN: ['1521-3951', '0370-1972']
DOI: https://doi.org/10.1002/pssb.202100056