Surface optical and bulk acoustic phonons in the topological insulator, Bi2Se2Te

We explore the phonon dynamics in thin films of the topological insulator material Bi2Se2Te using ultrafast pump-probe spectroscopy. The time resolved differential reflectivity in these films exhibit fast and slow oscillations. We have given a careful analysis of variation of phonon frequency as a f...

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Veröffentlicht in:	Applied physics letters 2015-06, Vol.106 (24)
Hauptverfasser:	Mukhopadhyay, Uditendu, Chaudhuri, Dipanjan, Sarkar, Jit, Singh, Sourabh, Gopal, Radha Krishna, Tammu, Sandeep, Upadhya, Prashanth C., Mitra, Chiranjib
Format:	Artikel
Sprache:	eng
Schlagworte:	Acoustic insulation Acoustics Applied physics Controllability Film thickness Phonons Thin films Topological insulators
Online-Zugang:	Volltext
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