Journal
APPLIED PHYSICS LETTERS
Volume 88, Issue 21, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2206551
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We present an unconventional scheme for acoustic charge transport devices based on a n-i-n lateral junction as electron injector. We show that surface acoustic waves (SAWs) are able to pick up electrons from a current flowing through the n-i-n junction and steer them towards the Ohmic output contact. Acoustic charge transport was studied at various temperatures, as a function of injector current, voltage bias, and SAW power. The possibility to modulate the acoustoelectric current by means of lateral in-plane gates is also discussed. The main advantage of our approach relies on the possibility to drive the n-i-n injector by means of both voltage and current sources, thus allowing to sample and process voltage and current signals. (c) 2006 American Institute of Physics.
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