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Magnetotransport Properties and Subband Structure of the Two‐Dimensional Electron Gas in the Inversion Layer of InSb Bicrystals under Hydrostatic Pressure
Author(s) -
Herrmann R.,
Kraak W.,
Handschack S.,
Schurig Th.,
Kusnick D.,
Schnackenburg B.
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.2221450113
Subject(s) - hydrostatic pressure , condensed matter physics , electron , population , quantum well , materials science , atmospheric pressure , inversion (geology) , electronic band structure , fermi gas , physics , optics , thermodynamics , geology , quantum mechanics , paleontology , laser , demography , structural basin , sociology , meteorology
Magnetotransport properties of the n‐inversion layer formed at the grain boundary in p‐InSb bicrystals are investigated. Hydrostatic pressure up to 10 3 MPa is used to characterize the properties of the two‐dimensional electron gas in the inversion layer. At atmospheric pressure in addition to previous results four series of quantum oscillations are revealed, indicating that four electric subbands are occupied. From quantum oscillations of the magnetoresistivity ϱ xx the characteristic parameters of the electric subbands (subband population n s i , subband energies E F — E i ) and their pressure dependences are established. A strong decrease of the carrier concentration in the inversion layer and of the corresponding subband population is observed when pressure is applied. A simple theoretical model based on the triangular‐well approximation and taking into account the pressure dependence of the energy band structure of pure InSb is used to calculate the energy band diagram of the quantum well and the pressure dependence of the subband parameters.