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Magnetic and electronic properties of spin-orbit coupled Dirac electrons on a (001) thin film of double-perovskite Sr2FeMoO6

Masahiko G. Yamada and George Jackeli
Phys. Rev. Materials 4, 074007 – Published 21 July 2020

Abstract

We present an interacting model for the electronic and magnetic behaviors of a strained (001) atomic layer of Sr2FeMoO6, which shows room-temperature ferrimagnetism and magnetoresistance with potential spintronics application in the bulk. We find that the strong spin-orbit coupling in the molybdenum 4d shell gives rise to a robust ferrimagnetic state with an emergent spin-polarized electronic structure consisting of flatbands and four massive or massless Dirac dispersions. Based on the spin-wave theory, we demonstrate that the magnetic order remains intact for a wide range of doping, leading to the possibility of exploring flatband physics, such as Wigner crystallization in electron-doped Sr2xLaxFeMoO6.

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  • Received 20 December 2017
  • Revised 3 May 2020
  • Accepted 26 June 2020

DOI:https://doi.org/10.1103/PhysRevMaterials.4.074007

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Open access publication funded by the Max Planck Society.

Published by the American Physical Society

Physics Subject Headings (PhySH)

  1. Research Areas
Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Masahiko G. Yamada1,2,3,* and George Jackeli3,4,†

  • 1Department of Materials Engineering Science, Osaka University, Toyonaka 560-8531, Japan
  • 2Institute for Solid State Physics, University of Tokyo, Kashiwa 277-8581, Japan
  • 3Max Planck Institute for Solid State Research, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
  • 4Institute for Functional Matter and Quantum Technologies, University of Stuttgart, Pfaffenwaldring 57, D-70569 Stuttgart, Germany

  • *myamada@mp.es.osaka-u.ac.jp
  • Also at Andronikashvili Institute of Physics, 0177 Tbilisi, Georgia.

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Issue

Vol. 4, Iss. 7 — July 2020

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