Regensburg 2016 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 24: Transport: Weyl Semimetals
TT 24.2: Vortrag
Dienstag, 8. März 2016, 10:00–10:15, H18
ARPES study of possible new Weyl semimetals — •Erik Haubold1, Yevhen Kushnirenko1, Alexander Fedorov1, Seunghyun Khim1, Sabine Wurmehl1,2, Dmitriy Efremov1, Timur Kim3, Moritz Hoersch3, Bernd Büchner1,2, and Sergey Borisenko1 — 1IFW Dresden, Institut für Festkörperforschung, Postfach 270116, 01171 Dresden — 2Institut für Festkörperphysik, TU Dresden, 01062 Dresden — 3Diamond Light Source, Harwell Campus, Didcot OX11 0DE, United Kingdom
Development of modern electronics struggles with the ongoing decrease of the structural size. New approaches, for example spintronic devices, could solve these problems as they utilize intrinsic properties of the materials like the spin. The most promising materials for these applications are topological insulators and (Weyl-) semimetals as they possess unique surface and bulk properties which could enable direct spin manipulation. The goal of this contribution is to find new materials belonging to the group of Weyl semimetals. Weyl semimetals host the electrons which behave as Weyl Fermions — non-degenerate versions of Dirac fermions. To check for the presence of these states we use angle-resolved photoemission spectroscopy at synchrotrons, as it directly resolves the 3D electronic structure of the materials and therefore gives direct insight into their electronic structure. One of the materials to be studied is TaIrTe4, which is a similar compound to the already proposed WTe2. This choice is supported by band structure calculations indicating the possible presence of Weyl fermions in this compound.