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Magnetoresistance of antidot lattices with grain boundaries

S. Klinkhammer, Hengyi Xu, T. Heinzel, U. Gennser, G. Faini, C. Ulysse, and A. Cavanna
Phys. Rev. B 77, 235311 – Published 13 June 2008

Abstract

The magnetotransport properties of antidot lattices containing artificially designed grain boundaries have been measured. We find that the grain boundaries broaden the commensurability resonances and displace them anisotropically. These phenomena are unexpectedly weak but differ characteristically from isotropic Gaussian disorder in the antidot positions. The observations are interpreted in terms of semiclassical trajectories, which tend to localize along the grain boundaries within certain magnetic-field intervals. Furthermore, our results indicate how the transport through superlattices generated by self-organizing templates may get influenced by grain boundaries.

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  • Received 7 April 2008

DOI:https://doi.org/10.1103/PhysRevB.77.235311

©2008 American Physical Society

Authors & Affiliations

S. Klinkhammer, Hengyi Xu, and T. Heinzel*

  • Heinrich-Heine-Universität, Universitätsstrasse 1, 40225 Düsseldorf, Germany

U. Gennser, G. Faini, C. Ulysse, and A. Cavanna

  • CNRS-LPN, Route de Nozay, 91960 Marcoussis, France

  • *thomas.heinzel@uni-duesseldorf.de

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Issue

Vol. 77, Iss. 23 — 15 June 2008

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