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. 2017 May 10;3(5):e1602371. doi: 10.1126/sciadv.1602371

Fig. 4. Periodic DW sliding in the simplified model.

Fig. 4

(A) Ground-state configuration of the simplified Hamiltonian (1), with the DW centered between two Mn sites. (B) High-energy configuration when the DW is centered at a Mn site. The schematics in (A) and (B) show the corresponding on-site energies in the double-well potential. (C) Washboard-like potential when the center of the DW slides across different sites. (D) Phonon spectral function in this simple model, showing the nondispersive sliding mode at the lowest energy, the breathing mode at a higher energy, and the dispersive bulk phonon branch. (E) Mode texture for a lateral shift of the DW position (top) and the corresponding DW sliding mode (bottom). (F) Mode texture for an increase of the DW width (top) and the corresponding DW breathing mode (bottom). (G) Dependence of the DW oscillation frequency on its width.