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Dresden 2011 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 55: TR: Topological Insulators 1 (jointly with HL and MA)

TT 55.3: Vortrag

Donnerstag, 17. März 2011, 16:30–16:45, HSZ 304

Electronic scattering and phonons in the 3D topological insulators Bi2Se3 and Cu0.07Bi2Se3 — •Peter Lemmens1,2, Vladimir Gnezdilov1,3, Dirk Wulferding1,2, and Helmuth Berger41IPKM, TU-BS, Braunschweig, Germany — 2NTH, Germany — 3ILTPE NAS, Ukraine — 4EPFL, Lausanne, Switzerland

The Raman-active lattice vibrations of three dimensional topological insulators Bi2Se3 and Cu0.07Bi2Se3 (R-3m) are investigated by Raman spectroscopy. All four expected Raman modes, 2A1g and 2Eg, were determined for the first time and compared with the theoretical predictions. Electronic scattering is observed as a quasielastic response in the doped material at higher temperatures.

Work supported by DFG and NTH.

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