Phys. Rev. B 75, 205301 (2007) [6 pages]Resonant reflection at magnetic barriers in quantum wiresReceived 4 January 2007; revised 22 February 2007; published 2 May 2007 The conductance of a quantum wire containing a single magnetic barrier is studied numerically by means of the recursive Green’s function technique. For sufficiently strong and localized barriers, Fano-type reflection resonances are observed close to the pinch-off regime. They are attributed to a magnetoelectric vortex-type quasibound state inside the magnetic barrier that interferes with an extended mode outside. We, furthermore, show that disorder can substantially modify the residual conductance around the pinch-off regime. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.75.205301
DOI:
10.1103/PhysRevB.75.205301
PACS:
73.23.−b, 75.70.Cn
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.