Observation of a Large-Scale Sheetlike Current Filament in a Thinn-GaAs Layer
- 15 February 1990
- journal article
- letter
- Published by Physical Society of Japan in Journal of the Physics Society Japan
- Vol. 59 (2) , 420-423
- https://doi.org/10.1143/jpsj.59.420
Abstract
Spatial patterns of a large-scale sheetlike current filament formed during low-temperature avalanche breakdown have been investigated in a thin epitaxial n-GaAs layer using the low-temperature scanning electron microscope. The sheetlike current filament was nucleated between planar-type ohmic contacts due to impact ionization of neutral shallow donors. The width of the current filament (200∼700 µm) was measured as a function of the sample voltage in the postbreakdown regime. A turbulent pattern observed in the beam-induced firing wave instability has also been measured.Keywords
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