Journal Article


Gustau Catalan
Jose Santiso
Neus Domingo
Felip Sandiumenge
Kalani Moore
Michele A. Conroy
Elena del Corro
Laura Rodríguez



thin films metal insulator transition titanium dioxide pixelation scanning kelvin probe microscopy vanadium dioxide room temperature cracks

Self-pixelation through fracture in VO2 thin films (2020)

Abstract The full text of this article will not be available in ULIR until the embargo expires on the 19/02/2021 Vanadium dioxide (VO2) is an archetypal Mott material with a metal-insulator transition (MIT) near room temperature. In thin films, this transition is affected by substrate-induced strain but, as film thickness increases, the strain is gradually relaxed and the bulk properties are recovered. Epitaxial films of VO2 on (001)-oriented rutile titanium dioxide (TiO2) relax substrate strain by forming a network of fracture lines that crisscross the film along well-defined crystallographic directions. This work shows that the electronic properties associated with these lines result in a pattern that resembles a “street map” of fully strained metallic VO2 blocks separated by insulating VO2 stripes. Each block of VO2 is thus electronically self-insulated from its neighbors and its MIT can be locally induced optically with a laser, or electronically via the tip of a scanning probe microscope, so that the films behave functionally as self-patterned pixel arrays.
Collections Ireland -> University of Limerick -> Centres Science and Engineering
Ireland -> University of Limerick -> Faculty of Science and Engineering
Ireland -> University of Limerick -> Bernal Institute

Full list of authors on original publication

Gustau Catalan, Jose Santiso, Neus Domingo, Felip Sandiumenge, Kalani Moore, Michele A. Conroy, Elena del Corro, Laura Rodríguez

Experts in our system

Kalani Moore
University of Limerick
Total Publications: 7
Michele A. Conroy
University of Limerick
Total Publications: 9