Dresden 2020 – scientific programme
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O: Fachverband Oberflächenphysik
O 103: Topology and Symmetry Protected Materials I
O 103.10: Talk
Thursday, March 19, 2020, 12:45–13:00, WIL A317
Drumhead surface state in ZrSiTe probed by scanning tunneling microscopy — •Brandon Stuart1, Seokhwan Choi1, Jisun Kim1, Mohamed Oudah1, Raquel Queiroz2, Lukas Muechler3, Leslie Schoop4, Douglas Bonn1, and Sarah Burke1 — 1Stewart Blusson Quantum Matter Institute, University of British Columbia,Vancouver, British Columbia, Canada V6T 1Z4 — 2Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 76100, Israel — 3Center for Computational Quantum Physics, The Flatiron Institute, New York, New York, 10010, USA — 4Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA
The family of materials ZrSiX (X = S, Se, Te) are topological nodal-line semimetals characterized by linear band crossings in 1-dimensional lines or loops in momentum space, rather than discrete points as in Dirac or Weyl semimetals. ZrSiTe is host to four nodal lines, two of which form loops in the BZ, one encircling the gamma point and the other encircling the Z point, and the other two forming lines that extend through the BZ. It was theoretically predicted that in the surface projection of ZrSiTe, the area between the nodal loops would contain a drumhead state, a topologically protected 2-dimensional surface state that links the nodal loops together [1]. Here, we show the first observed signature of electronic scattering within the drumhead state using low-temperature STM and QPI measurements.
[1] Muechler et al., arXiv:1909.02154