Time-Resolved Spatial Structures of Periodically-Driven Current Filament in n-GaAs : Condensed Matter: Electronic Properties, etc.
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概要
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Time-resolved spatial structures of a current density filament in n-GaAs have been investigated under a dc+ac drive voltage V_<dc>+V_<ac> sin2πf_dt at 4.2K. With a sinusoidal drive of V_<dc>=0.95V, V_<ac>=388mV and f_d=100kHz, we observe an S-shaped I-V curve caused by the impact ionization avalanche of neutral shallow donors and subsequent formation of a current density filament. Evolution of the current-density filament was studied by the time-resolved measurements of the photoluminescence quench-patterns. A new finding is the Turing bifurcation observed at around the breakdown voltage.
- 2000-02-15
著者
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Aoki Kazunori
Department Of Electrical And Electronic Engineering Faculty Of Engineering Kobe University
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Aoki Kazunori
Department Of Electrical And Electronics Engineering Faculty Of Engineering Kobe University
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- Time-Resolved Spatial Structures of Periodically-Driven Current Filament in n-GaAs : Condensed Matter: Electronic Properties, etc.
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