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Electron structure near abrupt edges in 2DEG under strong magnetic field
Author(s) -
Bartos I.,
Rosenstein B.
Publication year - 1996
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.2221930215
Subject(s) - condensed matter physics , landau quantization , enhanced data rates for gsm evolution , magnetic field , electron , physics , relaxation (psychology) , fermi gas , quantum mechanics , psychology , telecommunications , social psychology , computer science
Energies and wave functions of edge states in a two‐dimensional electron gas are evaluated for a finite step potential barrier model. The spectrum, instead of smooth bending of Landau branches in the vicinity of the barrier acquires a step‐like form; unexpected edge plateaus and significant energy gap reduction take place between the neighbouring Landau branches above the barrier tops. The origin of these phenomena is traced. Stability with respect to modifications is established. Manifestation of the qualitatively new features of electron densities of states in abrupt confinements through magnetooptical and nuclear magnetic spin relaxation effects is proposed.