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Direct detection of spontaneous polarization in Wurtzite GaAs nanowires

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Bauer, Benedikt ; Hubmann, Joachim ; Lohr, Matthias ; Reiger, Elisabeth ; Bougeard, Dominique ; Zweck, Josef
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Date of publication of this fulltext: 04 Jun 2014 09:58


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 ...


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