FisMat2017 - Submission - View

Abstract's title: Ultrafast switching of metal-oxide heterostructures
Submitting author: Andrea Ronchi
Affiliation: Università Cattolica del Sacro Cuore [1] and KU Leuven [2]
Affiliation Address: [1] Interdisciplinary Laboratories for Advanced Materials Physics (I-LAMP), Dipartimento di Matematica e Fisica, Università Cattolica del Sacro Cuore, Brescia I-25121, Italy [2] Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
Country: Italy
Oral presentation/Poster (Author's request): Poster
Other authors and affiliations: Pía Homm (Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Heverlee, Leuven, Belgium), Bart Van Bilzen (Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Heverlee, Leuven, Belgium), Gabriele Ferrini (Interdisciplinary Laboratories for Advanced Materials Physics (I-LAMP), Dipartimento di Matematica e Fisica, Università Cattolica del Sacro Cuore, Brescia I-25121, Italy), Francesco Banfi (Interdisciplinary Laboratories for Advanced Materials Physics (I-LAMP), Dipartimento di Matematica e Fisica, Università Cattolica del Sacro Cuore, Brescia I-25121, Italy), Mariela Menghini (Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Heverlee, Leuven, Belgium), Jean-Pierre Locquet (Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Heverlee, Leuven, Belgium), Claudio Giannetti (Interdisciplinary Laboratories for Advanced Materials Physics (I-LAMP), Dipartimento di Matematica e Fisica, Università Cattolica del Sacro Cuore, Brescia I-25121, Italy)
Abstract

The reversible and ultrafast manipulation of the electronic properties of materials is one of the main goals of the research in solid state physics and materials science. This achievement would pave the way to the development of solid-state devices which could be reversibly switched at THz frequencies. Among the many materials investigated for the purpose, Mott insulators are probably the most promising. In these materials, a metal-to-insulator transition, characterized by a resistivity change of several orders of magnitude, can be induced by electric or optical means. Here we propose a new route towards the reversible and ultrafast control of the resistivity of vanadium oxides, which is based on the combination of electrical and optical stimuli. The combined role of the bias and optical excitations could result in a homogeneous switching behaviour on a timescale faster than the effective local heating of the system, thus driving the metal-to-insulator transition along a non-thermal pathway inaccessible through conventional techniques.