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

S. Gao; A. Zhang; J. Yuan; J. Zhu

doi:10.1063/1.1691498

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

S. Gao, A. Zhang, J. Yuan, J. Zhu

Physics

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Pages (from-to)	2784-2786
Number of pages	2
Journal	Applied Physics Letters
Volume	84
Issue number	15
DOIs	https://doi.org/10.1063/1.1691498
Publication status	Published - 12 Apr 2004

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http://dx.doi.org/10.1063/1.1691498

Cite this

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title = "Anisotropic spectroscopy of nitrogen K-edge in group-III nitrides",

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.",

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AU - Gao, S.

AU - Zhang, A.

AU - Yuan, J.

AU - Zhu, J.

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Y1 - 2004/4/12

N2 - 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.

AB - 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.

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