title: Real-space and reciprocal-space Berry phases in the Hall effect of Mn(1-x)Fe(x)Si.
abstract: We report an experimental and computational study of the Hall effect in Mn(1-x)Fe(x)Si, as complemented by measurements in Mn(1-x)Co(x)Si, when helimagnetic order is suppressed under substitutional doping. For small x the anomalous Hall effect (AHE) and the topological Hall effect (THE) change sign. Under larger doping the AHE remains small and consistent with the magnetization, while the THE grows by over a factor of 10. Both the sign and the magnitude of the AHE and the THE are in excellent agreement with calculations based on density functional theory. Our study provides the long-sought material-specific microscopic justification that, while the AHE is due to the reciprocal-space Berry curvature, the THE originates in real-space Berry phases.
authors.affiliation: Physik-Department, Technische Universität München, James-Franck-Straße, D-85748 Garching, Germany.
authors.forename: C
authors.initials: C
authors.lastname: Franz
authors.affiliation: Institute for Advanced Simulation and Peter Grünberg Institut, Forschungszentrum Jülich and JARA, D-52425 Jülich, Germany.
authors.forename: F
authors.initials: F
authors.lastname: Freimuth
authors.affiliation: Physik-Department, Technische Universität München, James-Franck-Straße, D-85748 Garching, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Bauer
authors.affiliation: Physik-Department, Technische Universität München, James-Franck-Straße, D-85748 Garching, Germany.
authors.forename: R
authors.initials: R
authors.lastname: Ritz
authors.affiliation: Physik-Department, Technische Universität München, James-Franck-Straße, D-85748 Garching, Germany.
authors.forename: C
authors.initials: C
authors.lastname: Schnarr
authors.affiliation: Physik-Department, Technische Universität München, James-Franck-Straße, D-85748 Garching, Germany.
authors.forename: C
authors.initials: C
authors.lastname: Duvinage
authors.affiliation: Physik-Department, Technische Universität München, James-Franck-Straße, D-85748 Garching, Germany.
authors.forename: T
authors.initials: T
authors.lastname: Adams
authors.affiliation: Institute for Advanced Simulation and Peter Grünberg Institut, Forschungszentrum Jülich and JARA, D-52425 Jülich, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Blügel
authors.affiliation: Institute for Theoretical Physics, Universität zu Köln, Zülpicher Straße 77, D-50937 Köln, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Rosch
authors.affiliation: Institute for Advanced Simulation and Peter Grünberg Institut, Forschungszentrum Jülich and JARA, D-52425 Jülich, Germany.
authors.forename: Y
authors.initials: Y
authors.lastname: Mokrousov
authors.affiliation: Physik-Department, Technische Universität München, James-Franck-Straße, D-85748 Garching, Germany.
authors.forename: C
authors.initials: C
authors.lastname: Pfleiderer