Lattice dynamics and phase transitions in Fe3xGeTe2

A. Milosavljević, A. Šolajić, S. Djurdjić-Mijin, J. Pešić, B. Višić, Yu Liu (刘育), C. Petrovic, N. Lazarević, and Z. V. Popović
Phys. Rev. B 99, 214304 – Published 17 June 2019

Abstract

We present Raman spectroscopy measurements of the van der Waals bonded ferromagnet Fe3xGeTe2, together with lattice dynamics. Four out of eight Raman active modes are observed and assigned, in agreement with numerical calculations. The energies and linewidths of the observed modes display an unconventional temperature dependence at about 150 and 220 K, followed by the nonmonotonic evolution of the Raman continuum. Whereas the former can be related to the magnetic phase transition, the origin of the latter anomaly remains an open question.

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  • Received 23 April 2019

DOI:https://doi.org/10.1103/PhysRevB.99.214304

©2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

A. Milosavljević1, A. Šolajić1, S. Djurdjić-Mijin1, J. Pešić1, B. Višić1, Yu Liu (刘育)2, C. Petrovic2, N. Lazarević1, and Z. V. Popović1,3

  • 1Center for Solid State Physics and New Materials, Institute of Physics Belgrade, University of Belgrade, Pregrevica 118, 11080 Belgrade, Serbia
  • 2Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973-5000, USA
  • 3Serbian Academy of Sciences and Arts, Knez Mihailova 35, 11000 Belgrade, Serbia

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Issue

Vol. 99, Iss. 21 — 1 June 2019

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