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Effect of magnetic field on the local density of states of Mn acceptor magnets in GaAs
Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.ORCID iD: 0000-0003-4489-7561
University of Texas at Austin.
2011 (English)In: Bulletin of the American Physical Society, Volume 56, Number 1: APS March Meeting 2011, 2011, W15.00002- p.Conference paper, (Other academic)
Abstract [en]

Advances in atomic manipulation, real-space imagining and spectroscopic power of STM techniques have recently made it possible to investigate the local electronic properties of a few substitutional Mn impurities inserted in the GaAs surfaces [1]. Theoretical work [2] predicts that the local density of states in the vicinity of the Mn impurities should depend strongly on the direction of the Mn magnetic moment. In contrast, recent STM experiments [3] from several groups find a negligible dependence of the tunneling LDOS on the magnetic field direction for applied fields up to 7 T. Based on tight- binding calculations we interpret these findings by arguing that large LDOS signals require large angle moment rotations, and that the strength of the magnetic field used in present experiments is not strong enough to substantially modify the magnetic anisotropy landscape of Mn impurities near the GaAs surface.\\[4pt] [1] D. Kitchen et al., Nature, 442, 436 (2006); J. K. Garleff et al., Phys. Rev. B 82, 035303 (2010).\\[0pt] [2] T. O. Strandberg, C. M. Canali, and A. H. MacDonald, Phys. Rev. B 80, 024425 (2009). [3] P. M. Koenraad, Private Communication.

Place, publisher, year, edition, pages
2011. W15.00002- p.
National Category
Condensed Matter Physics
Research subject
Natural Science, Physics
Identifiers
URN: urn:nbn:se:lnu:diva-27460OAI: oai:DiVA.org:lnu-27460DiVA: diva2:635831
Conference
American Physical Society March Meeting, March 21–25, 2011; Dallas, Texas
Available from: 2013-07-05 Created: 2013-07-05 Last updated: 2016-11-01Bibliographically approved

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Mahani, Mohammad RezaCanali, Carlo M.
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CiteExportLink to record
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