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Figure 5
(a) An example of a reciprocal-space map reconstruction obtained with the side station, showing the TDS measured on a Bi2SiO5 single crystal in the ferroelectric phase. The intensity distribution in the H1L plane measured under room-temperature conditions shows shuttle-like TDS features along the [100] direction produced by a low-lying transverse acoustic branch due to TO–TA branch repulsion (see main text). (b) The corresponding map as calculated from DFT.

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