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O: Fachverband Oberflächenphysik
O 59: 2D semiconductors and van der Waals heterostructures V (joint session HL/DS/O)
O 59.6: Vortrag
Mittwoch, 18. März 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).