Scanning tunnelling spectroscopy characterization of ZnO single crystals



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Urbieta Quiroga, Ana Irene and Fernández Sánchez, Paloma and Piqueras de Noriega, Javier and Sekiguchi, T. (2001) Scanning tunnelling spectroscopy characterization of ZnO single crystals. Semiconductor Science and Technology, 16 (7). pp. 589-593. ISSN 0268-1242

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Bulk ZnO single crystals grown by the hydrothermal and flux methods have been characterized by scanning tunnelling spectroscopy performed in the different crystalline faces. Normalized differential conductance has been found to depend on the face considered. Polar O-terminated surfaces show an intrinsic conduction behaviour and surface bandgap in the range 0.4-0.8 eV, which depends on the position probed. The Zn polar surfaces show mainly n-type conduction. The non-polar m regions present either intrinsic or p-type behaviour. The differences observed are attributed to the nature of impurities and defects appearing in the polar and non-polar surfaces during crystal growth.

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© 2001 IOP Publishing Ltd.
This work was supported by MCYT –DGI (ProjectMAT2000-2119). Thanks are due to Professor N Sakagami (Akita National College of Technology, Japan) and Professor S Miyashita (Toyama Medical and Pharmaceutical University, Japan) for their contribution to crystal preparation.

Uncontrolled Keywords:Tunneling Spectroscopy, Zinc-Oxide, Electronic-Structure, Si(111)2x1 Surface, Microscopy, Ceramics
Subjects:Sciences > Physics > Materials
ID Code:26303
Deposited On:16 Jul 2014 10:57
Last Modified:09 Jun 2016 15:23

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