title: Dzyaloshinskii-Moriya Interaction and Hall Effects in the Skyrmion Phase of Mn(1-x) Fe(x)Ge.
abstract: We carry out density functional theory calculations which demonstrate that the electron dynamics in the Skyrmion phase of Fe-rich Mn_{1-x}Fe_{x}Ge 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.
authors.affiliation: Institut für Physik, Johannes Gutenberg Universität Mainz, D-55099 Mainz, Germany.|Department of Physics and Astronomy, Texas A&M University, College Station, Texas 77843-4242, USA.
authors.forename: J
authors.initials: J
authors.lastname: Gayles
authors.affiliation: Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany.
authors.forename: F
authors.initials: F
authors.lastname: Freimuth
authors.affiliation: Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany.
authors.forename: T
authors.initials: T
authors.lastname: Schena
authors.affiliation: Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany.
authors.forename: G
authors.initials: G
authors.lastname: Lani
authors.affiliation: Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany.
authors.forename: P
authors.initials: P
authors.lastname: Mavropoulos
authors.affiliation: Institute for Theoretical Physics and Center for Extreme Matter and Emergent Phenomena, Utrecht University, Leuvenlaan 4, 3584 CE Utrecht, The Netherlands.
authors.forename: R A
authors.initials: RA
authors.lastname: Duine
authors.affiliation: Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Blügel
authors.affiliation: Institut für Physik, Johannes Gutenberg Universität Mainz, D-55099 Mainz, Germany.|Department of Physics and Astronomy, Texas A&M University, College Station, Texas 77843-4242, USA.|Institute of Physics ASCR, Cukrovarnicka 10, 162 53 Praha 6, Czech Republic.
authors.forename: J
authors.initials: J
authors.lastname: Sinova
authors.affiliation: Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany.
authors.forename: Y
authors.initials: Y
authors.lastname: Mokrousov