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Caviglia, A D; Scherwitzl, R; Popovich, P; W Hu; Bromberger, H; Singla, R; Mitrano, M; Hoffmann, M C; Kaiser, S; Zubko, P; Gariglio, S; J -M Triscone; st, M; Cavalleri, A
arXiv.org, 11/2011Paper, Journal Article
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.
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