TY  - JOUR
AU  - Gayles, Jacob
AU  - Freimuth, F.
AU  - Schena, Timo
AU  - Lani, G.
AU  - Mavropoulos, P.
AU  - Duine, R. A.
AU  - Blügel, S.
AU  - Sinova, J.
AU  - Mokrousov, Y.
TI  - Dzyaloshinskii-Moriya Interaction and Hall Effects in the Skyrmion Phase of Mn 1 − x Fe x Ge
JO  - Physical review letters
VL  - 115
IS  - 3
SN  - 1079-7114
CY  - College Park, Md.
PB  - APS
M1  - FZJ-2015-04965
SP  - 036602
PY  - 2015
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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000357864800018
DO  - DOI:10.1103/PhysRevLett.115.036602
UR  - https://juser.fz-juelich.de/record/202789
ER  -