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Ultrafast Phonon Dynamics in Few-quintuple layer Topological Insulator Sb2Te3

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Abstract

We found few-quintuple layer Sb2Te3 presents the in-plane coherent oscillation (Eg2 mode) using time-resolved transmission measurements, which is different from the results, out-of-plane oscillations (A1g1 and A1g2 modes) obtained in bulk.

© 2014 Optical Society of America

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