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- W2097825013 abstract "We study a system of Dirac electrons with finite density of charge carriers coupled to an external electromagnetic field in two spatial dimensions, with a domain wall (DW) mass term. The interface between a thin-film ferromagnet and a three-dimensional topological insulator provides a condensed-matter realization of this model, when an out-of-plane domain wall magnetization is coupled to the topological insulator surface states. We show how, for films with very weak intrinsic in-plane anisotropies, the torque generated by the edge electronic current flowing along the DW competes with an effective in-plane anisotropy energy, induced by quantum fluctuations of the chiral electrons bound to the wall, in a mission to drive the internal angle of the DW from a Bloch configuration towards a N'eel configuration. Both the edge current and the induced anisotropy contribute to stabilize the internal angle, so that for weak intrinsic in-plane anisotropies DW motion is still possible without suffering from an extremely early Walker breakdown." @default.
- W2097825013 created "2016-06-24" @default.
- W2097825013 creator A5045576939 @default.
- W2097825013 creator A5050523884 @default.
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- W2097825013 date "2015-08-13" @default.
- W2097825013 modified "2023-10-17" @default.
- W2097825013 title "Dirac electrons and domain walls: A realization in junctions of ferromagnets and topological insulators" @default.
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- W2097825013 doi "https://doi.org/10.1103/physrevb.92.085416" @default.
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