Real-Space and Reciprocal-Space Berry Phases in the Hall Effect of Mn$_{1−x}$Fe$_{x}$Si

Franz, C.; Pfleiderer, C.; Blügel, S.; Freimuth, F.; Rosch, A.; Adams, T.; Bauer, A.; Mokrousov, Y.; Ritz, R.; Duvinage, C.; Schnarr, C.

doi:10.1103/PhysRevLett.112.186601

Journal Article

FZJ-2014-03167

Real-Space and Reciprocal-Space Berry Phases in the Hall Effect of Mn$_{1−x}$Fe$_{x}$Si

Franz, C. (Corresponding Author) ; Freimuth, F.FZJ* ; Bauer, A. ; Ritz, R. ; Schnarr, C. ; Duvinage, C. ; Adams, T. ; Blügel, S.FZJ* ; Rosch, A. ; Mokrousov, Y.FZJ* ; Pfleiderer, C.

2014
APS College Park, Md.

Physical review letters 112(18), 186601 (2014) [10.1103/PhysRevLett.112.186601]

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Please use a persistent id in citations: http://hdl.handle.net/2128/9129 doi:10.1103/PhysRevLett.112.186601

Abstract: We report an experimental and computational study of the Hall effect in Mn1−xFexSi, as complementedby measurements in Mn1−xCoxSi, when helimagnetic order is suppressed under substitutional doping.For small x the anomalous Hall effect (AHE) and the topological Hall effect (THE) change sign. Underlarger doping the AHE remains small and consistent with the magnetization, while the THE grows by overa factor of 10. Both the sign and the magnitude of the AHE and the THE are in excellent agreement withcalculations based on density functional theory. Our study provides the long-sought material-specificmicroscopic justification that, while the AHE is due to the reciprocal-space Berry curvature, the THEoriginates in real-space Berry phases.

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