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VOLUME 32 (1980) | ISSUE 8 | PAGE 529
Amplification of two-dimensional plasma waves in super-lattices
If there is a plasma in a spatially periodic potential field, then the transfer processes will play an important role in the damping of plasma waves according to the Landau mechanism. If there is a drift of a two-dimensional, electron plasma relative to a plane superlattice, then the plasma waves can be amplified in a certain interval of drift velocities. It is important that the amplification occurs at much lower drift velocities than the plasmon phase velocity ω/k.