Simulating spin-waves in strongly disordered magnets

ORAL

Abstract

Many scientifically important magnets contain disorder which complicates the theoretical analysis of their magnetic excitations. Examples include Sr2(Ir,Ru)O4 [1] with 50% (Ir,Ru) substitutions, Mn1.13Sb [2] with 13% Mn interstitials and Fe2.7GeTe2 [3] with 30% of Fe vacancies. To simulate magnons in these types of strongly disordered magnets we combine linear spin-wave theory [4] with the supercell approximation. [5] [1] Y. Cao, T. Berlijn et al PRB 95 (12), 121103 (2017) [2] A. E. Taylor, T. Berlijn, R. S. Fishman et al, PRB 91 (22), 224418 (2015) [3] G. D. Nguyen, T. Berlijn et al, PRB 97, 014425 (2018). [4] J. T. Haraldsen & R. S. Fishman, JPCM 21, 216001 (2009) [5] T. Berlijn et al, PRL 106, 077005 (2011).

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Presenters

  • Tom Berlijn

    Oak Ridge National Laboratory, Center for Nanophase Materials, Oak Ridge National Laboratory, Center for Nanophase Materials Sciences, Oak Ridge National Laboratory

Authors

  • Tom Berlijn

    Oak Ridge National Laboratory, Center for Nanophase Materials, Oak Ridge National Laboratory, Center for Nanophase Materials Sciences, Oak Ridge National Laboratory

  • Randy Fishman

    Oak Ridge National Laboratory, Materials Science and Technology Division, Oak Ridge National Lab, Oak Ridge, Tennessee, USA

  • Gonzalo Alvarez

    Oak Ridge National Laboratory

  • Weiguo Yin

    Brookhaven National Laboratory, Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, CMPMS, Brookhaven National Laboratory