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Title
Japanese: 
English:Photoinduced insulator-to-metal transition in ZnO/Mg0.15Zn0.85O heterostructures 
Author
Japanese: 塚崎 敦, 大友 明, 中野 匡規, 川崎 雅司.  
English: A. Tsukazaki, A. Ohtomo, M. Nakano, M. Kawasaki.  
Language English 
Journal/Book name
Japanese: 
English:Applied Physics Letters 
Volume, Number, Page Vol. 92    No. 5    052105-1-3
Published date Feb. 2008 
Publisher
Japanese: 
English: 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
File
Official URL <Go to ISI>://000253016500040
 
DOI https://doi.org/10.1063/1.2841044
Abstract We report on the persistent photoconductivity accompanied with a steep insulator-to-metal transition at low temperatures in ZnO/Mg0.15Zn0.85O heterostructures. The photoexcited electrons were confined in the ZnO adjacent to the Mg0.15Zn0.85O to form a two-dimensional electron gas (2DEG). The electron density was controlled either by the power or number of ultraviolet laser pulses (266 nm wavelength) irradiated to the sample. The 2DEG exhibits Shubnikov-de Haas oscillation in magnetoresistance, whose oscillation periods coincide with the electron density evaluated by Hall effect measurements.

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