Photostriction of strontium ruthenate

Tzu-Chiao Wei, Hsin-Ping Wang, Heng-Jui Liu, Dung-Sheng Tsai, Jr-Jian Ke, Chung-Lun Wu, Yu-Peng Yin, Qian Zhan, Gong-Ru Lin, Ying-Hao Chu and Jr-Hau He ()
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Tzu-Chiao Wei: Computer, Electrical and Mathematical Sciences and Engineering, King Abdullah University of Science and Technology
Hsin-Ping Wang: Computer, Electrical and Mathematical Sciences and Engineering, King Abdullah University of Science and Technology
Heng-Jui Liu: National Chung Hsing University
Dung-Sheng Tsai: Computer, Electrical and Mathematical Sciences and Engineering, King Abdullah University of Science and Technology
Jr-Jian Ke: Computer, Electrical and Mathematical Sciences and Engineering, King Abdullah University of Science and Technology
Chung-Lun Wu: Graduate Institute of Photonics and Optoelectronics, National Taiwan University
Yu-Peng Yin: School of Materials Science and Engineering, University of Science and Technology Beijing
Qian Zhan: School of Materials Science and Engineering, University of Science and Technology Beijing
Gong-Ru Lin: Graduate Institute of Photonics and Optoelectronics, National Taiwan University
Ying-Hao Chu: National Chiao Tung University
Jr-Hau He: Computer, Electrical and Mathematical Sciences and Engineering, King Abdullah University of Science and Technology

Nature Communications, 2017, vol. 8, issue 1, 1-8

Abstract: Abstract Transition metal oxides with a perovskite crystal structure exhibit a variety of physical properties associated with the lattice. Among these materials, strontium ruthenate (SrRuO3) displays unusually strong coupling of charge, spin and lattice degrees of freedom that can give rise to the photostriction, that is, changes in the dimensions of material due to the absorption of light. In this study, we observe a photon-induced strain as high as 1.12% in single domain SrRuO3, which we attribute to a nonequilibrium of phonons that are a result of the strong interaction between the crystalline lattice and electrons excited by light. In addition, these light-induced changes in the SrRuO3 lattice affect its electrical resistance. The observation of both photostriction and photoresistance in SrRuO3 suggests the possibility of utilizing the mechanical and optical functionalities of the material for next-generation optoelectronics, such as remote switches, light-controlled elastic micromotors, microactuators and other optomechanical systems.

Date: 2017
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DOI: 10.1038/ncomms15108

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