Twin motion faster than the speed of sound.
作者： Eilon Faran , Doron Shilo
DOI: 10.1103/PHYSREVLETT.104.155501
关键词:
摘要: Twin growth is commonly thought to be bounded by the velocity of shear waves ${C}_{T}$ at which information about this mechanical process travels in material. Here, we report on experimental evidence twin faster than material's speed sound. Driven an electric field, needle twins a ferroelectric crystal grew intersonic speed, with estimated average close $\sqrt{2}{C}_{T}$. These results strengthen recent theoretical indications dislocation motion, and contribute understanding several motion-related processes.
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