Explanation of the apparent sublinear photoconductivity of photorefractive barium titanate.
作者： Daniel Mahgerefteh , Jack Feinberg
DOI: 10.1103/PHYSREVLETT.64.2195
关键词: Photoconductivity 、 Charge carrier 、 Sublinear function 、 Photorefractive effect 、 Barium titanate 、 Acceptor 、 Materials science 、 Molecular physics 、 Excited state 、 Relative density
摘要: In our model shallow acceptors act as a reservoir for charges optically excited from the donors. As this fills, fraction of occupied donors changes appreciably, changing lifetime free carriers. We identify two types barium-titanate crystals having quite different photorefractive characteristics depending on their relative density and acceptors, we find that depth acceptor level is ∼0.4±0.1 eV in both
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