We observe periodic oscillations in the weak magnetic-field magnetoresistance for quantum wires subjected to a corrugated gate. This enhanced magnetoresistance is attributed to backscattering of electrons from the gate corrugations due to direct ballistic trajectories through the multiple ͑open͒ quantum dot structures. Simulations of the quantum transport also show evidence of the enhanced magnetoresistance, suggesting that the classical backscattering trajectories are carried into the quantum behavior of the wire.
This report was prepared as a n account of work sponsored by a n agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein d o not necessarily state or reflect those of the United States Government or any agency thereof. This report has been reproduced directly from the best available copy.
Low temperature magneto-conductance has been studied in ballistic dot arrays using corrugation splitgates. We have obseved many peaks at low fields superimposed upon the large negative magneto-resistance in double sided corrugation wires. These peaks can be considered to arise from three different phase breaking phenomena for coherent electron waves in ballistic quantum dots: weak localization in the quasi-ballistic regime, periodic oscillations due to coherent interferences and electron focusing of collimated electron waves. The three phenomena have been discussed in terms of their phase breaking behavior in dot arrays.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.