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Title: Direct detection of spontaneous polarization in wurtzite GaAs nanowires

We demonstrate the direct detection of spontaneous polarization in the wurtzite crystal phase of gallium-arsenide (GaAs) nanowires. Using differential phase contrast microscopy (DPC) in a scanning transmission electron microscope, we map the differences in charge distribution between the zinc-blende and wurtzite crystal phases and use twin defects in the zinc-blende phase to quantify the polarization strength. The value of 2.7 × 10{sup −3} C/m{sup 2} found for the polarization strength matches well with theoretical predictions.
Authors:
; ; ; ; ;  [1]
  1. Institut für Experimentelle und Angewandte Physik, Universität Regensburg (Germany)
Publication Date:
OSTI Identifier:
22300166
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 21; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; CHARGE DISTRIBUTION; CRYSTAL DEFECTS; CRYSTALS; DETECTION; FORECASTING; GALLIUM ARSENIDES; POLARIZATION; QUANTUM WIRES; TRANSMISSION ELECTRON MICROSCOPY; ZINC SULFIDES NANOWIRES