Ultrafast transient increase of oxygen octahedral rotations in a perovskite

URN to cite this document:: urn:nbn:de:bvb:355-epub-410394
DOI to cite this document:: 10.5283/epub.41039

Porer, Michael ; Fechner, M. ; Kubli, M. ; Neugebauer, M. J. ; Parchenko, S. ; Esposito, V. ; Narayan, A. ; Spaldin, N. A. ; Huber, Rupert ; Radovic, M. ; Bothschafter, E. M. ; Glownia, J. M. ; Sato, T. ; Song, S. ; Johnson, S. L. ; Staub, U.

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Abstract

We present femtosecond hard x-ray diffraction experiments that study the effect of photodoping on the perovskite EuTiO3. We observe an ultrafast transient increase of reflection intensities that are directly related to the antiferrodistortive rotation of the oxygen octahedra. This increase relates directly to an increase of the order parameter associated with a purely structural phase transition ...