Dresden 2014 – scientific programme

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O: Fachverband Oberflächenphysik

O 35: Transport: Topological Insulators I (TT jointly with O)

O 35.5: Talk

Tuesday, April 1, 2014, 15:00–15:15, HSZ 304

Excitations of surface and bulk states in spin orbit dominated materials — •Peter Lemmens¹, Vladimir Gnezdilov^1,2, Dirk Wulferding³, Patrik Recher⁴, Helmuth Berger⁵, Yoichi Ando⁶, R Sankar⁷, and Fang-Cheng Chou⁷ — ¹IPKM, TU-BS, Braunschweig — ²ILTPE, Kharkov, Ukraine — ³POSTECH, Korea — ⁴IMAPH, TU-BS, Braunschweig — ⁵EPFL, Lausanne, Switzerland — ⁶ISIR, Osaka, Japan — ⁷CCMS, National Taiwan Univ., Taipei, Taiwan

Using Raman scattering experiments we probe inelastic processes in the giant Rashba material BiTeI, the topological semimetal Cd₃As₂ and several topological insulators. By comparing surface with bulk scattering processes we notice the dominance of quantum well states. With exception to Cd₃As₂ all materials show pronounced resonances in the Raman scattering cross section.