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Chern number spins of Mn acceptor magnets in GaAs
Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics. (Condensed Matter Physics)
Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics. (Condensed Matter Physics)ORCID iD: 0000-0003-4489-7561
University of Texas at Austin, USA.
2011 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 106, 017202Article in journal (Refereed) Published
Abstract [en]

We determine the effective total spin J of local moments formed from acceptor states bound to Mn ions in GaAs by evaluating their magnetic Chern numbers. When individual Mn atoms are close to the sample surface, the total spin changes from J=1 to J=2, due to quenching of the acceptor orbital moment. For Mn pairs in bulk, the total J depends on pair orientation in the GaAs lattice and on the separation between the Mn atoms. We point out that Berry curvature variation as a function of local moment orientation can profoundly influence the quantum-spin dynamics of these magnetic entities.

Place, publisher, year, edition, pages
2011. Vol. 106, 017202
National Category
Condensed Matter Physics Condensed Matter Physics Condensed Matter Physics Condensed Matter Physics
Research subject
Natural Science, Physics
Identifiers
URN: urn:nbn:se:lnu:diva-7450DOI: 10.1103/PhysRevLett.106.017202OAI: oai:DiVA.org:lnu-7450DiVA: diva2:344268
Available from: 2010-08-18 Created: 2010-08-18 Last updated: 2016-11-01Bibliographically approved

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Strandberg, OlofCanali, Carlo M.
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