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Regensburg 2019 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 43: Focus Session: Topology in 3D Reciprocal Space: Beyond Dirac and Weyl Quasiparticles (joint session TT/MA)

TT 43.7: Talk

Wednesday, April 3, 2019, 18:00–18:15, H2

Thin-film investigations of 3D Dirac fermions in antiperovskite compounds — •Dennis Huang1, Hiroyuki Nakamura1, Eslam Khalaf1,2, Pavel Ostrovsky1,3, Kathrin Müller1, Ulrich Starke1, Alexander Yaresko1, and Hidenori Takagi1,4,51Max Planck Institute for Solid State Research, 70569 Stuttgart, Germany — 2Department of Physics, Harvard University, Cambridge MA 02138, USA — 3L. D. Landau Institute for Theoretical Physics RAS, 119334 Moscow, Russia — 4Department of Physics, University of Tokyo, 113-0033 Tokyo, Japan — 5Institute for Functional Matter and Quantum Technologies, University of Stuttgart, 70569 Stuttgart, Germany

Topological semimetals hosting Dirac or Weyl fermions lie at the forefront of research in condensed matter physics. Recently, a class of antiperovskite compounds (A3BO: A = Ca, Sr, Ba; B = Sn, Pb) have been predicted to possess both massive 3D Dirac fermions and topological surface states protected by crystal symmetry. Using molecular beam epitaxy, we grow thin films of the antiperovskite compounds Sr3PbO and Sr3SnO. We report ongoing efforts to elucidate the exotic electronic properties of these compounds using transport and spectroscopic probes.

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