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Coherent lattice dynamics of the topological insulator Bi<sub>2</sub>Te<sub>3</sub> probed by ultrafast spectroscopy

Coherent lattice dynamics of the topological insulator Bi2Te3 probed by ultrafast spectroscopy

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FLOCK, Johanna, Thomas DEKORSY, Oleg V. MISOCHKO, 2014. Coherent lattice dynamics of the topological insulator Bi2Te3 probed by ultrafast spectroscopy. In: Applied Physics Letters. 105(1), 011902. ISSN 0003-6951. eISSN 1077-3118. Available under: doi: 10.1063/1.4887483

@article{Flock2014Coher-28457, title={Coherent lattice dynamics of the topological insulator Bi2Te3 probed by ultrafast spectroscopy}, year={2014}, doi={10.1063/1.4887483}, number={1}, volume={105}, issn={0003-6951}, journal={Applied Physics Letters}, author={Flock, Johanna and Dekorsy, Thomas and Misochko, Oleg V.}, note={Article Number: 011902} }

2014-07-29T13:46:53Z Misochko, Oleg V. eng Flock, Johanna Dekorsy, Thomas Coherent lattice dynamics of the topological insulator Bi<sub>2</sub>Te<sub>3</sub> probed by ultrafast spectroscopy deposit-license 2014 Flock, Johanna Applied Physics Letters ; 105 (2014), 1. - 011902 2014-07-29T13:46:53Z Femtosecond laser pulses have been used to excite coherent optical phonons in single crystalline Bi2Te3. Oscillations from low and high frequency phonons of two A 1 g and one Eg symmetry modes are observed. In order to clarify the process of coherent phonon generation, the time domain measurements were complemented by spontaneous Raman scattering. The comparison of frequency and time domain results reveals the discrepancies between the time and frequency domain measurements among which the most striking difference is given by the fact that the E(I)g phonon is missing in the time domain data. Dekorsy, Thomas Misochko, Oleg V.

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