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

A. M. Kurakin | Zendy; S. А. Vitusevich | Zendy; Serhiy Danylyuk | Zendy; H. Hardtdegen | Zendy; N. Klein | Zendy; Z. Bougrioua | Zendy; А. В. Наумов | Zendy; A. E. Belyaev | Zendy

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

Author(s) -

A. M. Kurakin,

S. А. Vitusevich,

Serhiy Danylyuk,

H. Hardtdegen,

N. Klein,

Z. Bougrioua,

А. В. Наумов,

A. E. Belyaev

Publication year - 2009

Publication title -

journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.699

H-Index - 319

eISSN - 1089-7550

pISSN - 0021-8979

DOI - 10.1063/1.3100206

Subject(s) - heterojunction , effective mass (spring–mass system) , fermi gas , condensed matter physics , quantum well , electron , conduction band , wave function , materials science , wide bandgap semiconductor , quantum dot , physics , atomic physics , optoelectronics , optics , laser , quantum mechanics

We report the results of direct measurements and a theoretical investigation of the in-plane effective mass in the two-dimensional electron gas of nominally undoped AlGaN/GaN heterostructures with a different degree of quantum confinement. It is shown that in most cases the conduction band nonparabolicity effect is overestimated and the electron wave-function penetration into the barrier layer should be taken into account. The contribution of the wave-function hybridization is determined to play the dominant role. The band edge effective mass value is deduced to be (0.2 +/- 0.01)m(0). (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3100206

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