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Ballistic Electron Emission Microscopy on Quantum Wires
Author(s) -
Smoliner J.,
Eder C.,
Strasser G.,
Gornik E.
Publication year - 1997
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 - 10.1002/1521-3951(199711)204:1<386::aid-pssb386>3.0.co;2-b
Subject(s) - ballistic conduction , electron , scattering , materials science , condensed matter physics , quantum , spectral line , quantum wire , current (fluid) , transmission electron microscopy , liquid helium , helium , atomic physics , physics , nanotechnology , optics , nuclear physics , quantum mechanics , thermodynamics
In this paper ballistic electron emission microscopy (BEEM) studies on quantum wire structures are reported. In these experiments the quantum wires are directly observed both in sample topography and the BEEM current images. Especially at liquid helium temperatures, the BEEM current is found to be enhanced if the ballistic electrons are injected directly into the wire region. In the etched areas between the wires, the effective surface barrier height is found to be larger than on the wires. From the low temperature BEEM spectra we conclude, that diffusive scattering processes dominate the carrier transport across the Au/GaAs interface.