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Article overview
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Phonon-mediated non-equilibrium interaction between nanoscale devices | G.J. Schinner
; H.P. Tranitz
; W. Wegscheider
; J.P. Kotthaus
; S. Ludwig
; | Date: |
22 Jan 2009 | Abstract: | Interactions between mesoscopic devices induced by interface acoustic phonons
propagating in the plane of a two-dimensional electron system (2DES) are
investigated by phonon-spectroscopy. In our experiments ballistic electrons
injected from a biased quantum point contact emit phonons and a portion of them
are reabsorbed exciting electrons in a nearby degenerate 2DES. We perform
energy spectroscopy on these excited electrons employing a tunable
electrostatic barrier in an electrically separate and unbiased detector
circuit. The transferred energy is found to be bounded by a maximum value
corresponding to Fermi-level electrons excited and back-scattered by absorbing
interface phonons. Our results imply that phonon-mediated interaction plays an
important role for the decoherence of solid-state-based quantum circuits. | Source: | arXiv, 0901.3520 | Services: | Forum | Review | PDF | Favorites |
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