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Electron-beam induced instability during filamentary current transport inn-GaAs |
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| Authors: | U Rau K Aoki J Peinke J Parisi W Clauss R P Huebener |
| Institution: | (1) Physikalisches Institut, Lehrstuhl Experimentalphysik II, Universität Tübingen, Auf der Morgenstelle 14, D-7400 Tübingen, Federal Republic of Germany;(2) Department of Electrical Engineering, Faculty of Engineering, Kobe University, Rokkodai, Nada, 657 Kobe, Japan |
| Abstract: | We report experimental investigations on the current transport ofn-GaAs under the conditions of impact ionization avalanche breakdown at low temperatures. The spontaneous formation of a single current filament was observed by means of low-temperature scanning electron microscopy. An electron-beam induced instability occurs at the onset of filamentation. We demonstrate this instability to be due to the local disturbance at the boundaries of the current filament. Our results are compared to the similar behavior ofn-GaAs under IR irradiation (firing wave instability). |
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