AlGaN/GaN MBE heterostructures: polarization effects and their implication on electronic properties

Angela Rizzi; R. Lantier; Martin Kocan; Dirk Doerner; Hans Lueth; Alessandra Catellani

doi:10.1117/12.432554

9 July 2001 AlGaN/GaN MBE heterostructures: polarization effects and their implication on electronic properties

Angela Rizzi, R. Lantier, Martin Kocan, Dirk Doerner, Hans Lueth, Alessandra Catellani

Proceedings Volume 4283, Physics and Simulation of Optoelectronic Devices IX; (2001) https://doi.org/10.1117/12.432554
Event: Symposium on Integrated Optics, 2001, San Jose, CA, United States

Abstract

The origin of the strong polarization fields in nitride heterostructures is discussed by comparing the symmetry properties of zincblende and wurtzite structures. Some peculiar effects in nitride heterostructure electronic properties, induced by the polarization fields are considered, like the determination of the valence band offset by x-ray photo emission spectroscopy (XPS) and the formation of 2D electron gases in AlGaN/GaN. The Fermi level position at MBE GaN, AlGaN and AlN surfaces has been measured in-situ by XPS. The role played by surface states has been emphasized, experimentally and through self consistent calculations.

Citation Download Citation

Angela Rizzi, R. Lantier, Martin Kocan, Dirk Doerner, Hans Lueth, and Alessandra Catellani "AlGaN/GaN MBE heterostructures: polarization effects and their implication on electronic properties", Proc. SPIE 4283, Physics and Simulation of Optoelectronic Devices IX, (9 July 2001); https://doi.org/10.1117/12.432554

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