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O: Fachverband Oberflächenphysik
O 8: 2D Materials Beyond Graphene I
O 8.3: Vortrag
Montag, 20. März 2017, 11:00–11:15, REC/PHY C213
Electronic and atomic structure of the honeycomb lattice of Sn/Au(111) reconstruction — •Dominik Jungkenn1, Maniraj Mahalignam1, Sebastian Emmerich1, Lyu Lu1, Jobinson Kollamana1, Zheng Wei1, Wujun Shi2, Binghai Yan2, Benjamin Stadtmüller1, Mirko Cinchetti3, Stefan Mathias4, and Martin Aeschlimann1 — 1Department of Physics and Research Center OPTIMAS, University of Kaiserslautern, Erwin-Schrödinger-Str 46, 67663 Kaiserslautern — 2Max-Planck-Institute for Chemical Physics of Solids, Nöthnitzer Straße 40, 01187 Dresden — 3Experimentelle Physik VI, Technische Universität Dortmund, 44221 Dortmund — 4I. Physikalisches Institut, Georg-August-Universität Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen
Motivated by recent prediction of Stanene, a honeycomb structure of Sn atoms on a Au substrate [1], we investigated the structure formation of Sn on Au(111) using LEED and STM. In the sub monolayer regime, Sn forms a variety of ordered surface reconstructions depending on Sn coverage and post annealing temperature. One of the most stable structures is the (Sqrt3 x Sqrt3)R30° reconstruction which is characterized by a hexagonal super lattice. Angle resolved photoemission revealed a rich band structure with a Rashba type split band in the vicinity of the Gamma point, in agreement with band structure calculations based on density functional theory. Our results will be compared to the predicted fingerprints of stanene [1]. [1] S. Nigam, et al. Phys. Chem. Chem. Phys., 2015,17, 6705-6712