DataVXACS Applied Electronic MaterialsPaper
journal article·2020-05-26Open access

Self-Pixelation Through Fracture in VO2 Thin Films

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

ACS Applied Electronic Materials· Volume 2· Issue 5
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Source abstract

Abstract

Vanadium dioxide (VO2) is an archetypal Mott material with a metal–insulator transition (MIT) at 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.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Transition Metal Oxide Nanomaterials · Ga2O3 and related materials · ZnO doping and properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institut Català de Nanociència i Nanotecnologia (ICN2), CSIC and The Barcelona Institute of Nanoscience and Technology (BIST), Campus UAB, 08193 Barcelona, Catalonia, Spain

Departament de Física Aplicada, Facultat de Física, Universitat de Barcelona (UB), 08028 Barcelona, Catalonia, Spain

TEMUL, Department of Physics, School of Natural Sciences & Bernal Institute, University of Limerick, AD3-009 Limerick, Ireland

Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus de la UAB, 08193 Barcelona, Catalonia, Spain

ICREA—Institució Catalana de Recerca i Estudis Avançats, 08010 Barcelona, Catalonia

Funding

Ministerio de Econom?a, Industria y Competitividad, Gobierno de Espa?a · Science Foundation Ireland · Ministerio de Econom?a y Competitividad · Ag?ncia de Gesti? d'Ajuts Universitaris i de Recerca

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