Competing effects of geometrical deformation and band bending on the electronic properties of a nanoscale Schottky junction of PdSe <sub>2</sub>
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.
Authors
- Dimitre Dimitrov (ORCID: https://orcid.org/0000-0001-5451-1189)
- Alin Velea (ORCID: https://orcid.org/0000-0001-6851-2991)
- Andrea Locatelli (ORCID: https://orcid.org/0000-0001-7294-8309)
- Tevfik Onur Menteş (ORCID: https://orcid.org/0000-0003-0413-9272)
- Claudiu Locovei (ORCID: https://orcid.org/0000-0003-1097-8937)
- Harold J. W. Zandvliet (ORCID: https://orcid.org/0000-0001-6809-139X)
- Bogdana Borca (ORCID: https://orcid.org/0000-0001-5485-4536)
- Aurelian Catalin Galca (ORCID: https://orcid.org/0000-0002-1914-4210)
- Kai Sotthewes (ORCID: https://orcid.org/0000-0003-2073-6958)
- M. Szpytma (ORCID: https://orcid.org/0000-0002-2615-0854)
- Vera Marinova (ORCID: https://orcid.org/0000-0002-3499-0212)
- A.R. Hengst (ORCID: https://orcid.org/0009-0002-9581-6127)
- Iulia Cojocariu (ORCID: https://orcid.org/0000-0002-6408-3541)
Institutions
- University of Trieste (IT)
- Bulgarian Academy of Sciences (BG)
- Georgi Nadjakov Institute of Solid State Physics (BG)
- Elettra-Sincrotrone Trieste S.C.p.A. (IT)
- National Institute of Materials Physics (RO)
- Institutul National de Cercetare si Dezvoltare pentru Fizica Pamantului (RO)
- AGH University of Krakow (PL)
- University of Twente (NL)
Publication Details
- Journal
- 2D Materials
- Published
- 2025-10-28
- DOI
- https://doi.org/10.1088/2053-1583/ae1847
- Primary Topic
- 2D Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00