Quantized current in carbon nanotube quantum dots by surface acoustic waves

C Würstle, J Ebbecke, M E Regler, A Wixforth
2007 New Journal of Physics  
Charge pumping and current quantization in SAW-driven carbon nanotube devices M R Buitelaar, P J Leek, V I Talyanskii et al. -Acoustic charge transport in GaN nanowires J Ebbecke, S Maisch, A Wixforth et al. -Fabrication and characterization of GaAs/AlGaAs lateral quantum dot Q-Z Yang, G A C Jones, M J Kelly et al. -Recent citations Transporting and manipulating single electrons in surface-acoustic-wave minima Christopher J. B. Ford -Effect of periodic potential on exciton states in
more » ... ates in semiconductor carbon nanotubes Oleksiy Roslyak and Andrei Piryatinski -Non-adiabatic quantized charge pumping with tunable-barrier quantum dots: a review of current progress Bernd Kaestner and Vyacheslavs Kashcheyevs -This content was downloaded from IP address 207.241.231.83 on 25/07 Abstract. Single charge effects attract much attention with respect to possible applications as future transistor structures or for quantum cryptography. Here, surface acoustic wave mediated single charge transport through quantum dots (QDs) formed in a carbon nanotube (CNT) is presented. The CNT bridges metallic source and drain contacts on a piezoelectric host substrate, employing an acoustic alignment technique. The metal electrodes in contact with the nanotube provide tunnel barriers to the quasi one-dimensional electron system, hence forming a few QD in series due to the presence of defects within the CNT. The dynamic piezoelectric field associated with the surface wave leads to an acoustoelectric current through the system which turns out to be quantized like in a turnstile device.
doi:10.1088/1367-2630/9/3/073 fatcat:ylqcm556h5g2jcuamhvmdv3fbi