Electronic Correlation and Magnetism in the Ferromagnetic Metal Fe3GeTe2

Zhu, Jian-Xin; Janoschek, Marc; Chaves, D. S.; Cezar, J. C.; Durakiewicz, Tomasz; Ronning, Filip; Sassa, Yasmine; Mansson, Martin; Scott, B. L.; Wakeham, N.; Bauer, Eric Dietzgen; Thompson, Joe David

doi:10.1103/PhysRevB.93.144404

Title: Electronic Correlation and Magnetism in the Ferromagnetic Metal Fe₃GeTe₂

Journal Article · Tue Apr 05 00:00:00 EDT 2016 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.93.144404· OSTI ID:1338733

^[1]; Janoschek, Marc ^[1]; Chaves, D. S. ^[2]; Cezar, J. C. ^[2]; Durakiewicz, Tomasz ^[1]; Ronning, Filip ^[1]; Sassa, Yasmine ^[3]; Mansson, Martin ^[4]; Scott, B. L. ^[1]; Wakeham, N. ^[1]; Bauer, Eric Dietzgen ^[1]; Thompson, Joe David ^[1]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
National Center for Research in Energy and Materials (CNPEM), Campinas (Brazil). Brazil Synchrotron Light Lab. (LNLS)
Uppsala Univ. (Sweden). Dept. of Physics & Astronomy
Paul Scherrer Inst., Villigen (Switzerland). Lab. for Neutron Scattering and Imaging; KTH Royal Inst. of Technology, Stockholm (Sweden). Dept. of Materials and Nanophysics

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 local density approximation (LDA) of the density functional theory, and its combination with dynamical mean-field theory (DMFT). For comparison to these calculations, we have measured 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. Additionally, the inclusion of dynamical electronic correlation effects provides the experimentally observed magnetic moments, and the spectral density is in better agreement with photoemission data. Lastly, these results establish the importance of electronic correlations in this ferromagnet.

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Research Organization:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC52-06NA25396; INCA-2014-6426

OSTI ID:: 1338733

Alternate ID(s):: OSTI ID: 1245639

Report Number(s):: LA-UR-15-29522

Journal Information:: Physical Review B, Vol. 93, Issue 14

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 99 works

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