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Conduction Band Energy Spectrum of Two‐Dimensional Electrons in GaN/AlGaN Heterojunctions
Author(s) -
Knap W.,
Frayssinet E.,
Skierbiszewski C.,
Chaubet C.,
Sadowski M.L.,
Maude D.,
Asif Khan M.,
Shur M.S.
Publication year - 1999
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/(sici)1521-3951(199911)216:1<719::aid-pssb719>3.0.co;2-4
Subject(s) - heterojunction , condensed matter physics , cyclotron resonance , electron , materials science , effective mass (spring–mass system) , magnetic field , conduction band , excited state , landau quantization , thermal conduction , atomic physics , cyclotron , physics , quantum mechanics , composite material
The influence of a quantizing magnetic field on the conduction band of a two‐dimensional electron gas (2DEG) was investigated in GaN/AlGaN heterojunctions. The spin and Landau splittings were measured for heterojunctions with different carrier distributions, and it was possible to obtain quantitative information about the electron effective mass and its g ‐factor. Three main experiments are reported: (i) cyclotron resonance absorption in high magnetic fields, (ii) low temperature (300 mK) magnetotransport in tilted magnetic fields and (iii) electrically excited cyclotron emission. The results yield an important information on the conduction band energy spectra in GaN up to optical phonon energy.