THEORY FOR THE CYCLOTRON-RESONANCE OF HOLES IN STRAINED ASYMMETRIC GE-SIGE QUANTUM-WELLS

Citation
R. Winkler et al., THEORY FOR THE CYCLOTRON-RESONANCE OF HOLES IN STRAINED ASYMMETRIC GE-SIGE QUANTUM-WELLS, Physical review. B, Condensed matter, 53(16), 1996, pp. 10858-10865
Citations number
34
Categorie Soggetti
Physics, Condensed Matter
ISSN journal
01631829
Volume
53
Issue
16
Year of publication
1996
Pages
10858 - 10865
Database
ISI
SICI code
0163-1829(1996)53:16<10858:TFTCOH>2.0.ZU;2-8
Abstract
We present calculations of hole Landau levels, cyclotron masses, acid far-infrared spectra for strained asymmetric p-type Ge-SixCe1-x quantu m wells in a perpendicular magnetic field in order to interpret recent experimental results by Engelhardt et al. [Solid State Electron. 37, 949 (1994)]. Self-consistent hole subband calculations are combined wi th calculations of the Landau levels using a 6 x 6 k . p Hamiltonian f or the topmost Gamma(8) and Gamma(7) bulk valence bands. Our results a re in very good agreement with the experimental data. Taking into acco unt the coupling to the split-off band turns out to be important. The complex spectra of hole Landau levels in strained quantum wells remind one of the well known quantum resonance spectra of bulk p-type Ge und er uniaxial stress.