Dresden 2017 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 8: 2D Materials Beyond Graphene I

O 8.5: Vortrag

Montag, 20. März 2017, 11:30–11:45, REC/PHY C213

Realization of stanene on the surface of Au(111) — •Mahalingam Maniraj1, Benjamin Stadtmüller1, Wujun Shi2, Dominik Jungkenn1, Sebastian Emmerich1, Johannes Stöckl1, Lu Lyu1, Jobynson Kollamana1, Zheng Wei1, Anatol Jurenkow1, Sebastian Jakobs1, Yongli Gao3, Mirko Cinchetti4, Binghai Yan2, Stefan Mathias5, and Martin Aeschlimann11Department of Physics and Research Center OPTIMAS, University of Kaiserslautern, 67663 Kaiserslautern, Germany — 2Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany — 3Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627 — 4Experimentelle Physik VI, Technische Universität Dortmund, 44221 Dortmund, Germany — 5I. Physikalisches Institut, Georg-August-Universität Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany

Stanene was recently predicted and has subsequently triggered intense research on Sn-based graphene-like 2D materials. Combining LEED, STM, spin- and angle-resolved photoemission (ARPES) and DFT calculation, we present clear evidence for the formation of a stanene-like superstructure on the surface of Au(111). Our ARPES results show the existence of Dirac-cone-like bands around the Γ point with an electron velocity of 1×106 m/s, which originates from the admixture of Sn p and Au d states. Spin-resolved ARPES measurements reveal a topological insulator-like spin texture. Our realization of a Stanene-like superstructure lays the foundation for the easy fabrication and investigation of stanene as a potential next generation 2D material.

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