Regensburg 2019 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 66: Poster Wednesday: 2D Materials

O 66.6: Poster

Mittwoch, 3. April 2019, 17:45–20:00, Poster B2

Growth and characterization of single layer tantalum phosphide compounds — •Federico Andreatta, Ann Julie U. Holt, Marco Bianchi, Jill A. Miwa, and Philip Hofmann — Department of Physics and Astronomy, Aarhus University, 8000 Aarhus C, Denmark

Bulk transition metal pnictides have been recently found to host Weyl fermions, a novel state of topological quantum matter[1]. Transition metal pnictides are comprised of a transition metal and a group V element. Here, we show a method for growing tantalum phosphide compounds at the 2D limit on a Au(111) substrate. Using a combination of scanning tunneling microscopy and x-ray photoelectron spectroscopy we find two potential phases of single layer tantalum phosphide compounds. Intriguingly, one of the by-products of this growth method is single layer blue phosphorus[2]. We perform a systematic study of the growth parameters to tune the synthesis so that only single layer tantalum phosphide compounds are found at the surface.

[1] Z. K. Liu et al. Nat. Mater. (2015) 15, 27. [2] J. L. Zhang et al. Nano Lett. (2016) 16, 4903.