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Electronic correlation and magnetism in the ferromagnetic metal Fe3GeTe2
Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA..
Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA..
Natl Ctr Res Energy & Mat CNPEM, Brazil Synchrotron Light Lab LNLS, Campinas, SP, Brazil.;Inst Neel, Grp Micro & Nanomagnetism, Grenoble, France..
Natl Ctr Res Energy & Mat CNPEM, Brazil Synchrotron Light Lab LNLS, Campinas, SP, Brazil..
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2016 (English)In: PHYSICAL REVIEW B, ISSN 2469-9950, Vol. 93, no 14, 144404Article in journal (Refereed) PublishedText
Abstract [en]

Motivated by the search for design principles of rare-earth-free strong magnets, we present a study of electronic structure and magnetic properties of the ferromagnetic metal Fe3GeTe2 within the local-density approximation (LDA) of the density-functional theory, and its combination with dynamical mean-field theory (DMFT). To compare these calculations, we measure magnetic and thermodynamic properties as well as x-ray magnetic circular dichroism and the photoemission spectrum of single-crystal Fe3GeTe2. We find that the experimentally determined Sommerfeld coefficient is enhanced by an order of magnitude with respect to the LDA value. This enhancement can be partially explained by LDA+DMFT. In addition, the inclusion of dynamical electronic correlation effects provides the experimentally observed magnetic moments, and the spectral density is in better agreement with photoemission data. These results establish the importance of electronic correlations in this ferromagnet.

Place, publisher, year, edition, pages
2016. Vol. 93, no 14, 144404
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-294673DOI: 10.1103/PhysRevB.93.144404ISI: 000373567300005OAI: oai:DiVA.org:uu-294673DiVA: diva2:932307
Funder
Wenner-Gren FoundationsSwedish Research Council, INCA-2014-6426
Available from: 2016-06-01 Created: 2016-05-26 Last updated: 2016-06-01Bibliographically approved

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