Optically induced transient enhancement of a structural order parameter

M. Porer; M. Fechner; E. M. Bothschafter; L. Rettig; A. Narayan; M. Radovic; M. Savoini; V. Esposito; J. Rittmann; M. Kubli; T. Kubacka; T. Huber; M. Neugebauer; E. Abreu; S. Grübel; P. Beaud; G. Ingold; G. Lantz; S. Parchenko; S. Song; T. Sato; U. Aschauer; N. Spaldin; S. L. Johnson; U. Staub

doi:10.1051/epjconf/201920507001

Proceedings

Open Access

EPJ Web of Conferences 205, 07001 (2019)
https://doi.org/10.1051/epjconf/201920507001

Optically induced transient enhancement of a structural order parameter

M. Porer¹^*, M. Fechner²^,3, E. M. Bothschafter¹, L. Rettig¹, A. Narayan², M. Radovic¹, M. Savoini¹^,4, V. Esposito¹, J. Rittmann¹^,5, M. Kubli⁴, T. Kubacka⁴, T. Huber⁴, M. Neugebauer⁴, E. Abreu⁴, S. Grübel¹, P. Beaud¹^,5, G. Ingold¹^,5, G. Lantz⁴, S. Parchenko¹, S. Song⁶, T. Sato⁶, U. Aschauer⁷, N. Spaldin², S. L. Johnson⁴ and U. Staub¹^**

¹ Swiss Light Source, Paul Scherrer Institute, 5232 Villigen-PSI, Switzerland
² Materials Theory, ETH Zürich, 8093 Zürich, Switzerland
³ Max Planck Institute for the Structure and Dynamics of Matter, CFEL, 22761 Hamburg, Germany
⁴ Institute for Quantum Electronics, ETH Zürich, 8093 Zürich, Switzerland
⁵ SwissFEL, Paul Scherrer Institute, 5232 Villigen-PSI, Switzerland
⁶ LCLS, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
⁷ Department of Chemistry and Biochemistry, University of Bern, 3012 Bern, Switzerland

^* e-mail: michael.porer@psi.ch
^** e-mail: urs.staub@psi.ch

Published online: 16 April 2019

Abstract

We photoexcite SrTiO₃ and EuTiO₃ in their purely soft-mode-driven structurally distorted phase and trace the structural order parameter via ultra-short x-rays. We observe a rapid decay for SrTiO₃ and an intriguing transient enhancement for EuTiO3.

© The Authors, published by EDP Sciences, 2019

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