High-frequency oscillations in low-dimensional conductors and semiconductor superlattices induced by current in stack direction

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A narrow energy band of the electronic spectrum in some direction in low-dimensional crystals may lead to a negative differential conductance and N-shaped I-V curve that results in an instability of the uniform stationary state. A well-known stable solution for such a system is a state with electric field domain. We have found a uniform stable solution in the region of negative differential conductance. This solution describes uniform high-frequency voltage oscillations. Frequency of the oscillation is determined by antenna properties of the system. The results are applicable also to semiconductor superlattices.
8 pages, 3 figures

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Strongly Correlated Electrons

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http://salesiana.dossiersoluciones.com/handle/123456789/105610

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0512444
 http://arxiv.org/abs/cond-mat/0512444
 Physical Review B 72, 245412 (2005)
 doi:10.1103/PhysRevB.72.245412

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arXiv