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- Title
Beats of Quantum Oscillations of the Resistance in Two-Subband Electron Systems in Tilted Magnetic Fields.
- Authors
Bykov, A. A.; Strygin, I. S.; Goran, A. V.; Marchishin, I. V.; Nomokonov, D. V.; Bakarov, A. K.; Abedi, S.; Vitkalov, S. A.
- Abstract
Electron transport in single GaAs quantum wells of widths from 22 to 46 nm with two populated quantum-confinement subbands ES and EAS is investigated at a temperature of T = 4.2 K in tilted magnetic fields B < 2 T. The angle α between the applied magnetic field and the normal to the plane of the structure under study is varied from 0° to 90°. In a perpendicular magnetic field (α = 0), magnetointersubband oscillations with a period determined by the relation ΔSAS = EAS - ES = jħωc, where ωc is the cyclotron frequency and j is a positive integer, are observed in all investigated quantum wells. In tilted fields, the peaks of magnetointersubband oscillations are shifted toward higher fields B cos α. This shift is explained by an increase in the energy splitting ΔSAS with increasing component B sin α. In 46- and 36-nm-wide quantum wells, beats of magnetointersubband oscillations are observed at angles α > 72° and α > 85°, respectively. The origin of this unexpected behavior of magnetointersubband oscillations in tilted magnetic fields is discussed.
- Subjects
MAGNETIC fields; QUANTUM wells; OSCILLATIONS; ELECTRON transport; ELECTRONS; BEAT generation
- Publication
JETP Letters, 2019, Vol 109, Issue 6, p400
- ISSN
0021-3640
- Publication type
Article
- DOI
10.1134/S0021364019060080