Dresden 2020 – scientific programme
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O: Fachverband Oberflächenphysik
O 34: Poster Session - Topological Insulators
O 34.8: Poster
Monday, March 16, 2020, 18:15–20:00, P1C
Scanning tunneling Microscopy on the Magnetic Topological Insulator MnBi2Te4 — •Philipp Küppers1, Gunther Springholz2, Oliver Rader3, Marcus Liebmann1, and Markus Morgenstern1 — 1II. Inst. Phys. B and JARA-FIT, RWTH Aachen University — 2Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz — 3Abteilung Materialien für grüne Spintronik, Helmholtz Zentrum Berlin
Recent angle resolved photoemission spectroscopy studies show both gapped and ungapped Dirac cones in the magnetic topological insulator MnBi2Te4 both above and below the Neil temperature.
We present scanning tunneling microscopy data on samples grown by molecular beam epitaxy. The samples have been transfered into a homebuild ultra high vacuum STM operating at 4.3K with a vacuum shuttle operating at a pressure of 1*10−10mbar. We observe variations in topography beyond the atomic corrugation and present quasi particle interference patterns at the energies of the Dirac cone.