Quantum confinement effect on the effective mass in two-dimensional electron gas of AlGaN/GaN heterostructures

• DOI: 10.1063/1.3100206
• Publication Date: 2009-04-02T22:19:41Z
• Authors: A. M. Kurakin; S. A. Vitusevich; S. V. Danylyuk; H. Hardtdegen; N. Klein; Z. Bougrioua; A. V. Naumov; A. E. Belyaev
• Keywords: Wide-bandgap semiconductor

We report the results of direct measurements and a theoretical investigation in-plane effective mass in two-dimensional electron gas nominally undoped AlGaN/GaN heterostructures with different degree quantum confinement. It is shown that most cases conduction band nonparabolicity effect overestimated wave-function penetration into barrier layer should be taken account. The contribution hybridization determined to play dominant role. edge value deduced (0.2±0.01)m0.