$Optical transient grating pumped X-ray diffraction microscopy for studying mesoscale structural dynamics$
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Optical transient grating pumped X-ray diffraction microscopy for studying mesoscale structural dynamics

Abstract A fundamental understanding of materials’ structural dynamics, with fine spatial and temporal control, underpins future developments in electronic and quantum materials. Here, we introduce an optical transient grating pump and focused X-ray diffraction probe technique (TGXD) to examine the...

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Autores principales:	Travis D. Frazer, Yi Zhu, Zhonghou Cai, Donald A. Walko, Carolina Adamo, Darrell G. Schlom, Eric E. Fullerton, Paul G. Evans, Stephan O. Hruszkewycz, Yue Cao, Haidan Wen
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/0bd3e8a68eb947729bfb3756b63d40a0
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spelling	oai:doaj.org-article:0bd3e8a68eb947729bfb3756b63d40a02021-12-02T17:18:20ZOptical transient grating pumped X-ray diffraction microscopy for studying mesoscale structural dynamics10.1038/s41598-021-98741-y2045-2322https://doaj.org/article/0bd3e8a68eb947729bfb3756b63d40a02021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-98741-yhttps://doaj.org/toc/2045-2322Abstract A fundamental understanding of materials’ structural dynamics, with fine spatial and temporal control, underpins future developments in electronic and quantum materials. Here, we introduce an optical transient grating pump and focused X-ray diffraction probe technique (TGXD) to examine the structural evolution of materials excited by modulated light with a precisely controlled spatial profile. This method adds spatial resolution and direct structural sensitivity to the established utility of a sinusoidal transient-grating excitation. We demonstrate TGXD using two thin-film samples: epitaxial BiFeO3, which exhibits a photoinduced strain (structural grating) with an amplitude proportional to the optical fluence, and FeRh, which undergoes a magnetostructural phase transformation. In BiFeO3, structural relaxation is location independent, and the strain persists on the order of microseconds, consistent with the optical excitation of long-lived charge carriers. The strain profile of the structural grating in FeRh, in comparison, deviates from the sinusoidal excitation and exhibits both higher-order spatial frequencies and a location-dependent relaxation. The focused X-ray probe provides spatial resolution within the engineered optical excitation profile, resolving the spatiotemporal flow of heat through FeRh locally heated above the phase transition temperature. TGXD successfully characterizes mesoscopic energy transport in functional materials without relying on a specific transport model.Travis D. FrazerYi ZhuZhonghou CaiDonald A. WalkoCarolina AdamoDarrell G. SchlomEric E. FullertonPaul G. EvansStephan O. HruszkewyczYue CaoHaidan WenNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Travis D. Frazer Yi Zhu Zhonghou Cai Donald A. Walko Carolina Adamo Darrell G. Schlom Eric E. Fullerton Paul G. Evans Stephan O. Hruszkewycz Yue Cao Haidan Wen Optical transient grating pumped X-ray diffraction microscopy for studying mesoscale structural dynamics
description	Abstract A fundamental understanding of materials’ structural dynamics, with fine spatial and temporal control, underpins future developments in electronic and quantum materials. Here, we introduce an optical transient grating pump and focused X-ray diffraction probe technique (TGXD) to examine the structural evolution of materials excited by modulated light with a precisely controlled spatial profile. This method adds spatial resolution and direct structural sensitivity to the established utility of a sinusoidal transient-grating excitation. We demonstrate TGXD using two thin-film samples: epitaxial BiFeO3, which exhibits a photoinduced strain (structural grating) with an amplitude proportional to the optical fluence, and FeRh, which undergoes a magnetostructural phase transformation. In BiFeO3, structural relaxation is location independent, and the strain persists on the order of microseconds, consistent with the optical excitation of long-lived charge carriers. The strain profile of the structural grating in FeRh, in comparison, deviates from the sinusoidal excitation and exhibits both higher-order spatial frequencies and a location-dependent relaxation. The focused X-ray probe provides spatial resolution within the engineered optical excitation profile, resolving the spatiotemporal flow of heat through FeRh locally heated above the phase transition temperature. TGXD successfully characterizes mesoscopic energy transport in functional materials without relying on a specific transport model.
format	article
author	Travis D. Frazer Yi Zhu Zhonghou Cai Donald A. Walko Carolina Adamo Darrell G. Schlom Eric E. Fullerton Paul G. Evans Stephan O. Hruszkewycz Yue Cao Haidan Wen
author_facet	Travis D. Frazer Yi Zhu Zhonghou Cai Donald A. Walko Carolina Adamo Darrell G. Schlom Eric E. Fullerton Paul G. Evans Stephan O. Hruszkewycz Yue Cao Haidan Wen
author_sort	Travis D. Frazer
title	Optical transient grating pumped X-ray diffraction microscopy for studying mesoscale structural dynamics
title_short	Optical transient grating pumped X-ray diffraction microscopy for studying mesoscale structural dynamics
title_full	Optical transient grating pumped X-ray diffraction microscopy for studying mesoscale structural dynamics
title_fullStr	Optical transient grating pumped X-ray diffraction microscopy for studying mesoscale structural dynamics
title_full_unstemmed	Optical transient grating pumped X-ray diffraction microscopy for studying mesoscale structural dynamics
title_sort	optical transient grating pumped x-ray diffraction microscopy for studying mesoscale structural dynamics
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/0bd3e8a68eb947729bfb3756b63d40a0
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_version_	1718381126750306304

Optical transient grating pumped X-ray diffraction microscopy for studying mesoscale structural dynamics

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