arXiv:cond-mat/0206306AbstractReferencesReviewsResources
Momentum noise in a quantum point contact
A. Tajic, M. Kindermann, C. W. J. Beenakker
Published 2002-06-17Version 1
Ballistic electrons flowing through a constriction can transfer momentum to the lattice and excite a vibration of a free-standing conductor. We show (both numerically and analytically) that the electromechanical noise power P does not vanish on the plateaus of quantized conductance -- in contrast to the current noise. The dependence of $P$ on the constriction width can be oscillatory or stepwise, depending on the geometry. The stepwise increase amounts to an approximate quantization of momentum noise.
Comments: 4 pages including 4 figures
Journal: Phys.Rev.B 66, 241301(R) (2002)
Categories: cond-mat.mes-hall
Keywords: quantum point contact, momentum noise, approximate quantization, ballistic electrons, stepwise increase amounts
Tags: journal article
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