Ultrafast strain engineering in complex oxide heterostructures.
Phys Rev Lett
; 108(13): 136801, 2012 Mar 30.
Article
em En
| MEDLINE
| ID: mdl-22540718
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.
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2012
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Article