Quantized magnetic confinement in quantum wires

Date
Authors
Tarasov, A.
Hugger, S.
Xu, Hengyi
Cerchez, M.
Heinzel, T.
Zozoulenko, I. V.
Gasser-Szerer, U.
Reuter, D.
Wieck, A. D.
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Volume Title
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Abstract
Description
Ballistic quantum wires are exposed to longitudinal profiles of perpendicular magnetic fields composed of a spike (magnetic barrier) and a homogeneous part. An asymmetric magnetoconductance peak as a function of the homogeneous magnetic field is found, comprising quantized conductance steps in the interval where the homogeneous magnetic field and the magnetic barrier have identical polarities, and a characteristic shoulder with several resonances in the interval of opposite polarities. The observations are interpreted in terms of inhomogeneous diamagnetic shifts of the quantum wire modes leading to magnetic confinement.
Comment: 4 pages, 3 figures
Keywords
Condensed Matter - Mesoscale and Nanoscale Physics
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