Temperature Dependence of the Piezotronic and Piezophototronic Effects in a-axis GaN Nanobelts
Xingfu Wang1,2, Ruomeng Yu1, Wenbo Peng1
1School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332-0245, USA.
Abstract:
The temperature dependence of the piezotronic and piezophototronic effects in a-axis GaN nanobelts from 77 to 300 K is investigated. The piezotronic effect is enhanced by over 440% under lower temp-eratures. Two independent processes are discovered to form a competing mechanism through the investigation of the temperature dependence of the piezophototronic effect in a-axis GaN nanobelts.
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