The SrTiO$_3$ displacive transition revisited by Coherent X-ray Diffraction

Details The SrTiO$_3$ displacive transition revisited by Coherent X-ray Diffraction The SrTiO$_3$ displacive transition revisited by Coherent X-ray Diffraction

2006-11-12

arxiv.org/abs/cond-mat/0611308v2

Physics

Condensed Matter

Materials Science

4 pages, 3 figures, accepted in PRL

Scientific paper

We present a Coherent X-ray Diffraction study of the antiferrodistortive displacive transition of SrTiO$_3$, a prototypical example of a phase transition for which the critical fluctuations exhibit two length scales and two time scales. From the microbeam x-ray coherent diffraction patterns, we show that the broad (short-length scale) and the narrow (long-length scale) components can be spatially disentangled, due to 100 $\mu$m-scale spatial variations of the latter. Moreover, both components exhibit a speckle pattern, which is static on a $\sim$10 mn time-scale. This gives evidence that the narrow component corresponds to static ordered domains. We interpret the speckles in the broad component as due to a very slow dynamical process, corresponding to the well-known \emph{central} peak seen in inelastic neutron scattering.

Affiliated with

Also associated with

No associations

Rating

The SrTiO$_3$ displacive transition revisited by Coherent X-ray Diffraction does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The SrTiO$_3$ displacive transition revisited by Coherent X-ray Diffraction, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The SrTiO$_3$ displacive transition revisited by Coherent X-ray Diffraction will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-729652