Competing effects of geometrical deformation and band bending on the electronic properties of a nanoscale Schottky junction of PdSe 2
Year: 2025
Type: article
Abstract: Palladium diselenide (PdSe 2 ) is a two-dimensional (2D) transition metal dichalcogenide van der Waals material that exhibits a unique wrinkled pentagonal structure that results in strong anisotropic layer-dependent properties. Owing to these unique properties the material has a great potential for applications in electronic, optoelectronic, photonic and thermoelectric devices. Here, we study the electronic properties of monolayer (ML) PdSe 2 in a Schottky junction by contacting the material with a tungsten scanning tunneling microscope (STM) tip. The STM-induced lifting of the 2D layer leads to structural warping of the top layer, which causes significant changes in the electronic properties of PdSe 2 as well as the electrostatic potential across the junction. We compare the STM-determined work function of the warped PdSe 2 ML with the work function of bulk PdSe 2 as obtained by Kelvin probe force microscopy and electronic structure obtained by synchrotron-based angle-resolved photoemission spectroscopy, and x-ray photoelectron spectroscopy.
Source: 2D Materials
Authors: Kai Sotthewes, Aurelian Catalin Galca, Iulia Cojocariu, Matteo Jugovac, Tevfik Onur Menteş, Marcin Szpytma, Arend-Jan R Hengst, Claudiu Locovei, Vera Marinova, Dimitre Dimitrov, Andrea Locatelli, Alin Velea, Harold J W Zandvliet, Bogdana Borca
Institutions: University of Twente, National Institute of Materials Physics, International Center for Advanced Training and Research in Physics, University of Trieste, Elettra-Sincrotrone Trieste S.C.p.A., AGH University of Krakow, Bulgarian Academy of Sciences, Georgi Nadjakov Institute of Solid State Physics
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,895
OpenAlex ID: W4415638812