Regensburg 2019 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 62: Poster Wednesday: Topology and Symmetry-Protected Materials

O 62.1: Poster

Mittwoch, 3. April 2019, 17:45–20:00, Poster B1

Probing topological superconductivity in Indium doped topological crystalline insulator using high resolution photoemission spectroscopy — •Sangeeta Thakur^1,2,4, Deepnarayan Biswas¹, Akansha Singh³, Pransjit Sen³, K. Srinivas¹, A. Thamizhavel¹, Giovanni Di Santo², L. Petaccia², and K. Maiti¹ — ¹Tata Institute of Fundamental Research Colaba Mumbai India — ²Elettra Sincrotrone Trieste, Trieste, Italy — ³Harsh-Chandra Research Institute, HBNI, Allahabad, India — ⁴Freie Universität Berlin, Institut für Experimentalphysik, Berlin, Germany

Pb0.6Sn0.36In0.04Te single crystals were investigated by high resolution photoemission spectroscopy to probe the topological superconductivity predicted for indium doped topological crystalline insulator (TCI). XRD measurements on Pb0.6Sn0.36In0.04Te confirm the rocksalt structure peculiar for TCI. Angle resolved photoemission spectra show the signature of Dirac cone surface states which gives evidence for an inverted band structure as in the pristine Pb0.6Sn0.36Te TCI sample. The experimental valence band spectra can be explained reasonably well by the theoretical calculations. Presence of topological surface state makes Pb0.6Sn0.36In0.04Te a potential material to find the topological superconductivity in TCI.