Composition-dependent band gap and band-edge bowing in AIInN: A combined theoretical and experimental study

Stefan Schulz; Miguel A. Caro; Lay Theng Tan; Peter J. Parbrook; Robert W. Martin; Eoin P. O'Reilly

doi:10.7567/APEX.6.121001

Composition-dependent band gap and band-edge bowing in AIInN: A combined theoretical and experimental study

Stefan Schulz, Miguel A. Caro, Lay Theng Tan, Peter J. Parbrook, Robert W. Martin, Eoin P. O'Reilly

Not published at Aalto University

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

36 Citations (Scopus)

Abstract

A combined experimental and theoretical study of the band gap of AllnN is presented, which confirms the breakdown of the virtual crystal approximation (VCA) for the conduction and valence band edges. Composition-dependent bowing parameters for these quantities are extracted. Additionally, composition-dependent band offsets for GaN/AllnN systems are provided. We show that local strain and built-in fields affect the band edges significantly, leading to optical polarization switching at a much lower In composition than expected from a VCA approach.

Original language	English
Article number	121001
Journal	APPLIED PHYSICS EXPRESS
Volume	6
Issue number	12
DOIs	https://doi.org/10.7567/APEX.6.121001
Publication status	Published - Dec 2013
MoE publication type	A1 Journal article-refereed

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