Ultrafast strain engineering in complex oxide heterostructures

Abstract

We report on ultrafast optical experiments in which femtosecond mid-infrared 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.

References in corpus (4)

• Nonlinear phononics: A new ultrafast route to lattice control
• Asymmetric orbital-lattice interactions in ultra-thin correlated oxide films
• Role of magnetic and orbital ordering at the metal-insulator transition in NdNiO3
• Control of octahedral rotations in (LaNiO${}_3$)${}_n$/(SrMnO${}_3$)${}_m$ superlattices

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