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Edge-channel transport through quantum wires with a magnetic quantum dot

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Sim,  H. S.
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Sim, H. S., Ihm, G., Kim, N., Lee, S. J., & Chang, K. J. (2002). Edge-channel transport through quantum wires with a magnetic quantum dot. Physica E, 12(1-4), 719-721. Retrieved from http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VMT-44KPSWB-1R&_user=42421&_handle=W-WA-A-A-WVU-MsSAYVA-UUW-AUCCEUVWBZ-AUWCDUCBD-WVU-U&_fmt=summary&_coverDate=01%2F31%2F2002&_rdoc=177&_orig=browse&_srch=%23toc%236159%232002%23999879998%23300337!&_cdi=6159&view=c&_acct=C000002818&_version=1&_urlVersion=0&_userid=42421&md5=33bcab929c6d57c21c5134a4edfd2280.


Cite as: http://hdl.handle.net/11858/00-001M-0000-002B-385E-6
Abstract
We investigate the scattering of edge channels by a magnetic quantum dot. which is formed by two different magnetic fields B* and B-0 inside and outside the dot, respectively, in a quantum wire. We calculate the two-terminal conductance (G) of the wire and find that for gamma (=B*/B-0) > 0, G is quantized. while for gamma < 0 it is not quantized, This feature results from the different magnetic confinements, caused by nonuniform magnetic fields, between the two cases. (C) 2002 Elsevier Science B.V. All rights reserved.