Dresden 2020 – scientific programme

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DS: Fachverband Dünne Schichten

DS 22: 2D semiconductors and van der Waals heterostructures V (joint session HL/DS/O)

DS 22.6: Talk

Wednesday, March 18, 2020, 10:45–11:00, POT 81

Electronic Properties of Two-Dimensional ZrSe₃-Films — •Lars Thole¹, Christopher Belke¹, Sonja Locmelis², Peter Behrens², and Rolf J. Haug¹ — ¹Institut für Festkörperphysik, Leibniz Universität Hannover, 30167 Hannover, Germany — ²Institut für Anorganische Chemie, Leibniz Universität Hannover, 30167 Hannover, Germany

The family of 2d materials offers a big variety of different material classes [1]. This includes the transition metal trichalcogenides (TMTC) of the form MX₃, where M is a transition metal and X is a chalcogen [2, 3]. Here we exfoliated ZrSe₃ into thin films and contacted them with electron beam lithography. These thin flakes were investigated by means of optical microscopy, atomic force microscopy and electrical measurements. During this, it was shown that the material degrades in ambient condition. Furthermore, an activation energy of about 0.6 eV was measured. Inducing charge carriers showed the samples to be n-doped semiconductors. Finally, a mean free path for the bulk material was determined.

[1] A. K. Geim et al., Nature, 499, 419-425 (2013).

[2] J. O. Island et al., 2D Materials, 4, 0220033 (2017).

[3] J. Dai et al., WIREs Comput. Mol. Sci., 6, 211-222 (2016).