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Shot noise in negative-differential-conductance devices
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2.For a recent review see, e.g., The Physics and Applications of Resonant Tunneling Diodes, edited by H. Mizuta and T. Tanoue (Cambridge University Press, Cambridge, 1995).
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11.The mechanism that gives rise to NDC in a superlattice tunnel diode is analogous to that of a conventional tunnel (Esaki) diode, whose noise properties were studied long ago [J. J. Tiemann, Proc. IRE 48, 1418 (1960)]. Unfortunately, those early experiments were done at room temperature and using a very primitive (for today’s standards) noise-measurement setup, so that the results were not conclusive. The data showed that the noise’s power spectral density was somewhat larger than at the beginning of the NDC region. This behavior was accounted for by a model that assumed full shot noise and included the contribution of both the emitter-to-collector and collector-to-emitter currents.
12.The following values were used: barrier height, 310 meV; effective mass, where is the free-electron mass.
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