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Calculations of Magnetotransport Properties of InSb Bicrystals with Several Populated Q2D Subbands
Author(s) -
Nachtwei G.,
Schulze D.,
Gobsch G.,
Paasch G.,
Kraak W.,
Krüger H.,
Herrmann R.
Publication year - 1988
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/pssb.2221480132
Subject(s) - condensed matter physics , magnetoresistance , magnetic field , landau quantization , electron , fermi gas , inversion (geology) , shubnikov–de haas effect , fermi energy , physics , materials science , quantum oscillations , quantum mechanics , geology , paleontology , structural basin
The magnetic subband structure of the quasi two‐dimensional electron gas in an inversion layer with several populated electric subbands in InSb bicrystals is calculated using a straightforward and accurate method developed recently. The oscillating part of the magnetoresistance and the magnetic field dependence of the Hall resistance are evaluated by using the Ando model. Two different assumptions concerning the Fermi level position in dependence on the magnetic field are presented and discussed. A good description of the magnetotransport data determined in previous experiments is achieved. It is shown that the simple model of δ‐like Landau energy levels and the resulting discontinous magnetic field dependence of the Fermi energy for a fixed inversion electron density is not able to describe the magnetotransport behaviour determined in the experiments. Estimates of the electron mobilities in the electric subbands from the Landau level broadening lead us to the conclusion that the mobilities obtained from the onset of the Shubnikovde Haas‐oscillations are lower limits.