Berlin 2018 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 18: Focus Session: Frontiers in Reducible Oxide Surface Science II
O 18.7: Vortrag
Montag, 12. März 2018, 17:15–17:30, HE 101
A DFT study of the (011) and (110) surfaces of rutile VO2 — •Florian Mittendorfer1,2, Jakub Planer1,2, Wernfried Mayr-Schmölzer1,2, and Josef Redinger1,2 — 1Center for Computational Materials Science, TU Wien, Vienna, Austria — 2Institute of Applied Physics, TU Wien, Vienna, Austria
Vanadium dioxide is a promising material with potential applications for fast electronic or optical switching. These applications are related to a structural and electronic transition from monoclinic to a rutile phase at 340K. Our results show that standard DFT (PBE) approaches give a reasonable description of the metallic rutile phase, while more advanced approaches, such as meta-GGA+U (SCAN) or hybrid functionals are needed to obtain the correct band gap of ∼0.7 eV for the monoclinic phase. In addition, I will discuss the stability of various terminations for the rutile VO2(011) and (110) surface and compare them to recent experimental STM data.