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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 Gnezdilov1,2, Dirk Wulferding3, Patrik Recher4, Helmuth Berger5, Yoichi Ando6, R Sankar7, and Fang-Cheng Chou71IPKM, 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.

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