title: Ultrafast strain engineering in complex oxide heterostructures.
abstract: We report on ultrafast optical experiments in which femtosecond midinfrared radiation is used to excite the lattice of complex oxide heterostructures. By tuning the excitation energy to a vibrational mode of the substrate, a long-lived five-order-of-magnitude increase of the electrical conductivity of NdNiO(3) epitaxial thin films is observed as a structural distortion propagates across the interface. Vibrational excitation, extended here to a wide class of heterostructures and interfaces, may be conducive to new strategies for electronic phase control at THz repetition rates.
authors.affiliation: Max-Planck Research Group for Structural Dynamics-Center for Free Electron Laser Science, University of Hamburg, Notkestrasse 85, 22607 Hamburg, Germany. Andrea.Caviglia@mpsd.cfel.de
authors.forename: A D
authors.initials: AD
authors.lastname: Caviglia
authors.forename: R
authors.initials: R
authors.lastname: Scherwitzl
authors.forename: P
authors.initials: P
authors.lastname: Popovich
authors.forename: W
authors.initials: W
authors.lastname: Hu
authors.forename: H
authors.initials: H
authors.lastname: Bromberger
authors.forename: R
authors.initials: R
authors.lastname: Singla
authors.forename: M
authors.initials: M
authors.lastname: Mitrano
authors.forename: M C
authors.initials: MC
authors.lastname: Hoffmann
authors.forename: S
authors.initials: S
authors.lastname: Kaiser
authors.forename: P
authors.initials: P
authors.lastname: Zubko
authors.forename: S
authors.initials: S
authors.lastname: Gariglio
authors.forename: J-M
authors.initials: JM
authors.lastname: Triscone
authors.forename: M
authors.initials: M
authors.lastname: Först
authors.forename: A
authors.initials: A
authors.lastname: Cavalleri