Two-dimensional ordering and collective magnetic excitations in the dilute ferromagnetic topological insulator (Bi0.95 Mn0.05)2 Te3

dc.contributor.author Vaknin, David
dc.contributor.author Pajerowski, Daniel
dc.contributor.author Schlagel, Deborah
dc.contributor.author Schlagel, Deborah
dc.contributor.author Dennis, Kevin
dc.contributor.author McQueeney, Robert
dc.contributor.department Ames Laboratory
dc.contributor.department Physics and Astronomy
dc.date 2019-10-02T02:40:46.000
dc.date.accessioned 2020-06-29T23:22:45Z
dc.date.available 2020-06-29T23:22:45Z
dc.date.issued 2019-06-21
dc.description.abstract <p>Employing elastic and inelastic neutron scattering (INS) techniques, we report on the microscopic properties of the ferromagnetism in the dilute magnetic topological insulator (Bi0.95Mn0.05)2 Te3. Neutron diffraction of polycrystalline samples shows the ferromagnetic (FM) ordering is long range within the basal plane, and mainly two dimensional (2D) in character with short-range correlations between layers below T C ≈ 13 K. Remarkably, we observe gapped and collective magnetic excitations in this dilute magnetic system. The excitations appear typical of quasi-2D FM systems despite the severe broadening of short-wavelength magnons which is expected from the random spatial distribution of Mn atoms in the Bi planes. A detailed analysis of the INS provides the average values for exchange couplings which are consistent with reports of carrier-mediated interactions.</p>
dc.identifier archive/lib.dr.iastate.edu/ameslab_manuscripts/381/
dc.identifier.articleid 1382
dc.identifier.contextkey 14939206
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath ameslab_manuscripts/381
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/7324
dc.language.iso en
dc.relation.ispartofseries IS-J 9978; IS-J 9906
dc.source.bitstream archive/lib.dr.iastate.edu/ameslab_manuscripts/381/IS_J_9978.pdf|||Fri Jan 14 23:53:00 UTC 2022
dc.source.uri 10.1103/PhysRevB.99.220404
dc.subject.disciplines Condensed Matter Physics
dc.title Two-dimensional ordering and collective magnetic excitations in the dilute ferromagnetic topological insulator (Bi0.95 Mn0.05)2 Te3
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 220ce8a4-546b-4118-8d44-911799a0ffa1
relation.isOrgUnitOfPublication 25913818-6714-4be5-89a6-f70c8facdf7e
relation.isOrgUnitOfPublication 4a05cd4d-8749-4cff-96b1-32eca381d930
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