Journal
APPLIED PHYSICS LETTERS
Volume 95, Issue 25, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3268783
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Funding
- NJUST [AB96382]
- Japanese Society for the Promotion of Science (JSPS)
- Nanyang Technological University
- Ministry of Education of Singapore [AcRF RG30/06, ARC 16/08]
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Ferroelectric materials possess spontaneous polarization pointing from negative to positive bound surface charges. When a ferroelectric semiconductor is polarized, the induced electric field can drive free carriers, e.g., electrons in an n-type material, to neutralize surface charges until such field becomes zero. Such diffusion of free carriers induces a depletion region. Polarization switch can move the depletion region to the opposite surface, thus it can be used to manipulate any properties that are affected by such depletion region, such as unidirectional current and photovoltaic current. (C) 2009 American Institute of Physics. [doi:10.1063/1.3268783]
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