Acoustoconductance of quantum contacts

Details Acoustoconductance of quantum contacts Acoustoconductance of quantum contacts

1998-08-04

arxiv.org/abs/cond-mat/9808033v2

Physica B 263-264 (1999) 504-506

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

New reference added. To appear in Physica B, proceedings of the 9th International Conference on Phonon Scattering (Phonons 98)

Scientific paper

10.1016/S0921-4526(98)01250-2

We describe theoretically the acoustoconductance (AC) of quantum contacts. One characteristic of a contact which distinguishes it from a long, uniform wire is a strong, energy-dependent transmission probability. This has several consequences for AC. Electrons which are forward scattered by phonons can contribute to AC and, furthermore, AC can have positive sign (i.e. a conductance-increase under the influence of phonons). By contrast, for uniform wires only backscattered electrons contribute to AC which always has negative sign.

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