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@INPROCEEDINGS{Rai:1005430,
      author       = {Rai, Venus},
      title        = {{M}agnetic and transport studies of the parent and {F}e
                      doped {H}exagonal- {M}n3{G}e {W}eyl semimetal},
      reportid     = {FZJ-2023-01467},
      year         = {2023},
      abstract     = {Mn3Ge displays large anomalous Hall effects (AHE) below the
                      Néel temperature (365 K) that can be switched in a small
                      magnetic field (20 Oe) [1], which makes it a strong
                      candidate for room-temperature spintronic applications. The
                      chiral anomaly effect, which is prominent in Weyl semimetal,
                      has not been explored in Mn3Ge. We have performed detailed
                      transport studies of hexagonal-Mn3Ge, and observed a few
                      signatures of a chiral anomaly effect in this compound. In
                      addition to this, we also observed that the sample goes
                      through a topological electronic transition near 200 K,
                      driven by the in-plane lattice parameter of the sample.
                      Moreover, the AHE observed in Weyl semimetals has its
                      origins in the topological Weyl nodes, which can be tuned by
                      suitable dopants of the parent phase. Therefore, we have
                      also explored the electrical transport and magnetic
                      properties of the (Mn1-αFeα)3Ge (α = 0 – 0.3) compounds
                      to study the change in the strength of AHE and the chiral
                      anomaly effect of the doped samples. Signatures of the AHE
                      and chiral anomaly were observed in low Fe doped compounds
                      as well. To predict the origin of AHE in doped samples, the
                      ground state magnetic structures of Fe doped Mn3Ge compounds
                      were determined using neutron diffraction techniques. We
                      observed that the magnetic structure of the doped sample
                      remains the same as that of the parent compound in the
                      temperature regime where AHE was observed. These
                      observations led us to two main conclusions: (i) the Weyl
                      points are very likely to be present in the doped samples as
                      long as the magnetic structure of the doped compound remains
                      the same as Mn3Ge. (ii) the characteristics of the Weyl
                      points can be tuned by suitable doping of the Weyl
                      semimetals.},
      month         = {Mar},
      date          = {2023-03-16},
      organization  = {(Digital) Institute Seminar JCNS-2,
                       Forschungszentrum Jülich, JCNS +
                       online (Germany + online), 16 Mar 2023},
      subtyp        = {Invited},
      cin          = {JCNS-2 / PGI-4 / JARA-FIT},
      cid          = {I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106 /
                      $I:(DE-82)080009_20140620$},
      pnm          = {632 - Materials – Quantum, Complex and Functional
                      Materials (POF4-632) / 6G4 - Jülich Centre for Neutron
                      Research (JCNS) (FZJ) (POF4-6G4)},
      pid          = {G:(DE-HGF)POF4-632 / G:(DE-HGF)POF4-6G4},
      typ          = {PUB:(DE-HGF)31},
      url          = {https://juser.fz-juelich.de/record/1005430},
}