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Ultrafast Strain Engineering in Complex Oxide Heterostructures

A. D. Caviglia, R. Scherwitzl, P. Popovich, W. Hu, H. Bromberger, R. Singla, M. Mitrano, M. C. Hoffmann, S. Kaiser, P. Zubko, S. Gariglio, J.-M. Triscone, M. Först, and A. Cavalleri
Phys. Rev. Lett. 108, 136801 – Published 26 March 2012
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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 NdNiO3 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.

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  • Received 4 November 2011

DOI:https://doi.org/10.1103/PhysRevLett.108.136801

© 2012 American Physical Society

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Ultrafast Phase Control in Oxide Thin Films

Published 26 March 2012

Fast excitations of lattice vibrations in a substrate can alter the electronic properties of an oxide thin film.

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Authors & Affiliations

A. D. Caviglia1,*, R. Scherwitzl3, P. Popovich1, W. Hu1, H. Bromberger1, R. Singla1, M. Mitrano1, M. C. Hoffmann1, S. Kaiser1, P. Zubko3, S. Gariglio3, J.-M. Triscone3, M. Först1, and A. Cavalleri1,2

  • 1Max-Planck Research Group for Structural Dynamics-Center for Free Electron Laser Science, University of Hamburg, Notkestrasse 85, 22607 Hamburg, Germany
  • 2Department of Physics, Clarendon Laboratory, University of Oxford, Parks Rd. Oxford OX1 3PU , United Kingdom
  • 3Département de Physique de la Matière Condensée, University of Geneva, 24 Quai Ernest-Ansermet, 1211 Genève 4, Switzerland

  • *Andrea.Caviglia@mpsd.cfel.de

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Issue

Vol. 108, Iss. 13 — 30 March 2012

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