期刊
APPLIED PHYSICS LETTERS
卷 104, 期 21, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4880209
关键词
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资金
- German Research Foundation (DFG) [SFB 689, FOR 957]
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 x 10(-3) C/m(2) found for the polarization strength matches well with theoretical predictions. (C) 2014 AIP Publishing LLC.
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