Home > Publications database > Dzyaloshinskii-Moriya Interaction and Hall Effects in the Skyrmion Phase of Mn 1 − x Fe x Ge > print

001     202789
005     20210129220230.0
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|a Gayles, Jacob
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245 _ _ |a Dzyaloshinskii-Moriya Interaction and Hall Effects in the Skyrmion Phase of Mn 1 − x Fe x Ge
260 _ _ |a College Park, Md.
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520 _ _ |a We carry out density functional theory calculations which demonstrate that the electron dynamics in the Skyrmion phase of Fe-rich Mn1−xFexGe alloys is governed by Berry phase physics. We observe that the magnitude of the Dzyaloshinskii-Moriya interaction directly related to the mixed space-momentum Berry phases, changes sign and magnitude with concentration x in direct correlation with the data of Shibata et al. [Nat. Nanotechnol. 8, 723 (2013)]. The computed anomalous and topological Hall effects in FeGe are also in good agreement with available experiments. We further develop a simple tight-binding model able to explain these findings. Finally, we show that the adiabatic Berry phase picture is violated in the Mn-rich limit of the alloys.
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