TY - JOUR
T1 - Dzyaloshinskii-Moriya Interaction and Hall Effects in the Skyrmion Phase of Mn1-xFexGe
JF - PHYSICAL REVIEW LETTERS
Y1 - 2015
A1 - Gayles, J.
A1 - Freimuth, F.
A1 - Schena, T.
A1 - Lani, G.
A1 - P. Mavropoulos
A1 - Duine, R. A.
A1 - S. Blügel
A1 - Sinova, J.
A1 - Mokrousov, Y.
AB - 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.
VL - 115
ER -