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Anisotropic spectroscopy of nitrogen K-edge in group-III nitrides

Gao, S., Zhang, A., Zhu, J. and Yuan, J. (2004) Anisotropic spectroscopy of nitrogen K-edge in group-III nitrides. Applied Physics Letters, 84 (15). pp. 2784-2786. ISSN 0003-6951

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Abstract

Ab initio calculation of nitrogen K-edges for use in the core-level spectroscopy of industrially important group-III nitrides (AlN, GaN, InN) has been carried out systematically including the core-hole effect. The theoretical spectra for transition into final states with px,y and pz symmetries are in good agreement with the available anisotropic electron energy-loss measurements. Our spectra can be used as "fingerprints" to characterize the group-III nitrides, for example, not only to distinguish between different polymorphs of group-III nitrides, but also to identify the presence of surface oxidation. We have also presented our simulated results in terms of an orientation-average spectrum and a sample orientation-dependent dichroic spectrum for future reference.

Item Type: Article
Institution: The University of York
Academic Units: The University of York > Physics (York)
Depositing User: York RAE Import
Date Deposited: 12 Aug 2009 13:41
Last Modified: 12 Aug 2009 13:41
Published Version: http://dx.doi.org/10.1063/1.1691498
Status: Published
Publisher: American Institute of Physics
Identification Number: 10.1063/1.1691498
URI: http://eprints.whiterose.ac.uk/id/eprint/5629

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