Magnetic field-induced non-trivial electronic topology in Fe3−xGeTe2

  title={Magnetic field-induced non-trivial electronic topology in Fe3−xGeTe2},
  author={Juan Macy and D. R. Ratkovski and Purnima P. Balakrishnan and Mara Strungaru and Yu-che Chiu and Aikaterini Flessa Savvidou and Alex Moon and Wenkai Zheng and Ashley Weiland and Gregory Todd McCandless and Julia Y. Chan and G. Sathish Kumar and Michael Shatruk and Alexander J. Grutter and Julie Ann Borchers and William D. Ratcliff and Eun Sang Choi and Elton J. G. Santos and Luis Balicas},
  journal={Applied Physics Reviews},
The anomalous Hall, Nernst and thermal Hall coefficients of Fe$_{3-x}$GeTe$_2$ display several features upon cooling, like a reversal in the Nernst signal below $T = 50$ K pointing to a topological transition (TT) associated to the development of magnetic spin textures. Since the anomalous transport variables are related to the Berry curvature, a possible TT might imply deviations from the Wiedemann-Franz (WF) law. However, the anomalous Hall and thermal Hall coefficients of Fe$_{3-x}$GeTe$_2… 

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