Boundary instability of a two-dimensional electron fluid
Dyakonov M.I.1
1Laboratoire de Physique Theorique et Astroparticules, Universite Montpellier 2, CNRS, France
Поступила в редакцию: 6 февраля 2008 г.
Выставление онлайн: 20 июля 2008 г.
It was shown previously that the current-carrying state of a Field Effect Transistor with asymmetric source and drain boundary conditions may become unstable against spontaneous generation of plasma waves [1]. By extending the analysis to the two-dimensional case we find that the dominant instability modes correspond to waves propagating in the direction perpendicular to the current and localized near the boundaries. This new type of instability should result in plasma turbulency with a broad frequency spectrum. More generally, it is shown that a similar instability might exist, when a strong enough current goes through a single boundary between the gated and ungated regions. PACS: 85.30.Tv, 72.15.Nj
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- I thank Wojciech Knap and Nina Dyakonova for their kind permission to use the unpublished experimental results shown in Fig. 1
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