Ultrafast strain engineering and coherent structural dynamics from resonantly driven optical phonons in LaAlO3

Abstract Strain engineering has been extended recently to the picosecond timescales, driving ultrafast metal–insulator phase transitions and the propagation of ultrasonic demagnetization fronts. However, the nonlinear lattice dynamics underpinning interfacial optoelectronic phase switching have not...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	J. R. Hortensius, D. Afanasiev, A. Sasani, E. Bousquet, A. D. Caviglia
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Materials of engineering and construction. Mechanics of materials TA401-492 Atomic physics. Constitution and properties of matter QC170-197
Acceso en línea:	https://doaj.org/article/5ced7d83801c4ecba883c01132a40822
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:5ced7d83801c4ecba883c01132a40822
record_format	dspace
spelling	oai:doaj.org-article:5ced7d83801c4ecba883c01132a408222021-12-02T14:18:56ZUltrafast strain engineering and coherent structural dynamics from resonantly driven optical phonons in LaAlO310.1038/s41535-020-00297-z2397-4648https://doaj.org/article/5ced7d83801c4ecba883c01132a408222020-12-01T00:00:00Zhttps://doi.org/10.1038/s41535-020-00297-zhttps://doaj.org/toc/2397-4648Abstract Strain engineering has been extended recently to the picosecond timescales, driving ultrafast metal–insulator phase transitions and the propagation of ultrasonic demagnetization fronts. However, the nonlinear lattice dynamics underpinning interfacial optoelectronic phase switching have not yet been addressed. Here we perform time-resolved all-optical pump-probe experiments to study ultrafast lattice dynamics initiated by impulsive light excitation tuned in resonance with a polar lattice vibration in LaAlO3 single crystals, one of the most widely utilized substrates for oxide electronics. We show that ionic Raman scattering drives coherent rotations of the oxygen octahedra around a high-symmetry crystal axis. By means of DFT calculations we identify the underlying nonlinear phonon–phonon coupling channel. Resonant lattice excitation is also shown to generate longitudinal and transverse acoustic wave packets, enabled by anisotropic optically induced strain. Importantly, shear strain wave packets are found to be generated with high efficiency at the phonon resonance, opening exciting perspectives for ultrafast material control.J. R. HortensiusD. AfanasievA. SasaniE. BousquetA. D. CavigliaNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492Atomic physics. Constitution and properties of matterQC170-197ENnpj Quantum Materials, Vol 5, Iss 1, Pp 1-6 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Materials of engineering and construction. Mechanics of materials TA401-492 Atomic physics. Constitution and properties of matter QC170-197
spellingShingle	Materials of engineering and construction. Mechanics of materials TA401-492 Atomic physics. Constitution and properties of matter QC170-197 J. R. Hortensius D. Afanasiev A. Sasani E. Bousquet A. D. Caviglia Ultrafast strain engineering and coherent structural dynamics from resonantly driven optical phonons in LaAlO3
description	Abstract Strain engineering has been extended recently to the picosecond timescales, driving ultrafast metal–insulator phase transitions and the propagation of ultrasonic demagnetization fronts. However, the nonlinear lattice dynamics underpinning interfacial optoelectronic phase switching have not yet been addressed. Here we perform time-resolved all-optical pump-probe experiments to study ultrafast lattice dynamics initiated by impulsive light excitation tuned in resonance with a polar lattice vibration in LaAlO3 single crystals, one of the most widely utilized substrates for oxide electronics. We show that ionic Raman scattering drives coherent rotations of the oxygen octahedra around a high-symmetry crystal axis. By means of DFT calculations we identify the underlying nonlinear phonon–phonon coupling channel. Resonant lattice excitation is also shown to generate longitudinal and transverse acoustic wave packets, enabled by anisotropic optically induced strain. Importantly, shear strain wave packets are found to be generated with high efficiency at the phonon resonance, opening exciting perspectives for ultrafast material control.
format	article
author	J. R. Hortensius D. Afanasiev A. Sasani E. Bousquet A. D. Caviglia
author_facet	J. R. Hortensius D. Afanasiev A. Sasani E. Bousquet A. D. Caviglia
author_sort	J. R. Hortensius
title	Ultrafast strain engineering and coherent structural dynamics from resonantly driven optical phonons in LaAlO3
title_short	Ultrafast strain engineering and coherent structural dynamics from resonantly driven optical phonons in LaAlO3
title_full	Ultrafast strain engineering and coherent structural dynamics from resonantly driven optical phonons in LaAlO3
title_fullStr	Ultrafast strain engineering and coherent structural dynamics from resonantly driven optical phonons in LaAlO3
title_full_unstemmed	Ultrafast strain engineering and coherent structural dynamics from resonantly driven optical phonons in LaAlO3
title_sort	ultrafast strain engineering and coherent structural dynamics from resonantly driven optical phonons in laalo3
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/5ced7d83801c4ecba883c01132a40822
work_keys_str_mv	AT jrhortensius ultrafaststrainengineeringandcoherentstructuraldynamicsfromresonantlydrivenopticalphononsinlaalo3 AT dafanasiev ultrafaststrainengineeringandcoherentstructuraldynamicsfromresonantlydrivenopticalphononsinlaalo3 AT asasani ultrafaststrainengineeringandcoherentstructuraldynamicsfromresonantlydrivenopticalphononsinlaalo3 AT ebousquet ultrafaststrainengineeringandcoherentstructuraldynamicsfromresonantlydrivenopticalphononsinlaalo3 AT adcaviglia ultrafaststrainengineeringandcoherentstructuraldynamicsfromresonantlydrivenopticalphononsinlaalo3
_version_	1718391608514183168

Ultrafast strain engineering and coherent structural dynamics from resonantly driven optical phonons in LaAlO3

Ejemplares similares