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Self‐Organized Current‐Density Patterns and Bifurcations in n‐GaAs with Concentric Contact Geometry
Author(s) -
Hirschinger J.,
Niedernostheide F.J.,
Prettl W.,
Novák V.,
Kostial H.
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<477::aid-pssb477>3.0.co;2-7
Subject(s) - protein filament , nucleation , condensed matter physics , geometry , concentric , magnetic field , bending , division (mathematics) , materials science , current (fluid) , physics , composite material , mathematics , arithmetic , quantum mechanics , thermodynamics
Self‐organized nucleation of current‐density filaments has been investigated in n‐GaAs epitaxial layers with different concentric contact geometries by measuring the photoluminescence spatially resolved. While the first filament arises from a spatially uniform state, further filaments are generated by filament division processes. Filament growth and filament division of filaments reveal hysteretic behavior. In a magnetic field filament bending or destabilization of stationary patterns in favor of oscillating filamentary patterns occur.