Composition-Dependent Band Gap and Band-Edge Bowing in AlInN: A Combined Theoretical and Experimental Study

Composition-Dependent Band Gap and Band-Edge Bowing in AlInN: A Combined Theoretical and Experimental Study

A combined experimental and theoretical study of the band gap of AlInN 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, compositio...

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Veröffentlicht in:Applied physics express 2013-12, Vol.6 (12), p.121001-121001-4
Hauptverfasser: Schulz, Stefan, Caro, Miguel A, Tan, Lay-Theng, Parbrook, Peter J, Martin, Robert W, O'Reilly, Eoin P
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container_issue 12
container_start_page 121001
container_title Applied physics express
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creator Schulz, Stefan
Caro, Miguel A
Tan, Lay-Theng
Parbrook, Peter J
Martin, Robert W
O'Reilly, Eoin P
description A combined experimental and theoretical study of the band gap of AlInN 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/AlInN 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.
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title Composition-Dependent Band Gap and Band-Edge Bowing in AlInN: A Combined Theoretical and Experimental Study
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