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    Strain-Mediated Inverse Photoresistivity in SrRuO3/La0.7Sr0.3MnO3Superlattices

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    Type
    Article
    Authors
    Liu, Heng-Jui
    Wei, Tzu-Chiao
    Zhu, Yuan-Min
    Liu, Rui-Rui
    Tzeng, Wen-Yen
    Tsai, Chih-Ya
    Zhan, Qian
    Luo, Chih-Wei
    Yu, Pu
    He, Jr-Hau cc
    Chu, Ying-Hao cc
    He, Qing
    KAUST Department
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Electrical Engineering Program
    KAUST Solar Center (KSC)
    Date
    2015-12-08
    Online Publication Date
    2015-12-08
    Print Publication Date
    2016-02
    Permanent link to this record
    http://hdl.handle.net/10754/621507
    
    Metadata
    Show full item record
    Abstract
    © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. In the pursuit of novel functionalities by utilizing the lattice degree of freedom in complex oxide heterostructure, the control mechanism through direct strain manipulation across the interfaces is still under development, especially with various stimuli, such as electric field, magnetic field, light, etc. In this study, the superlattices consisting of colossal-magnetoresistive manganites La0.7Sr0.3MnO3 (LSMO) and photostrictive SrRuO3 (SRO) have been designed to investigate the light-dependent controllability of lattice order in the corresponding functionalities and rich interface physics. Two substrates, SrTiO3 (STO) and LaAlO3 (LAO), have been employed to provide the different strain environments to the superlattice system, in which the LSMO sublayers exhibit different orbital occupations. Subsequently, by introducing light, we can modulate the strain state and orbital preference of LSMO sublayers through light-induced expansion of SRO sublayers, leading to surprisingly opposite changes in photoresistivity. The observed photoresistivity decreases in the superlattice grown on STO substrate while increases in the superlattice grown on LAO substrate under light illumination. This work has presented a model system that demonstrates the manipulation of orbital-lattice coupling and the resultant functionalities in artificial oxide superlattices via light stimulus. A fascinating model system of optic-driven functionalities has been achieved by artificial superlattices consisting of manganite La0.7Sr0.3MnO3 (LSMO) and photostrictive SrRuO3 (SRO). With design of different initial strain and orbital states in superlattices, we can even control the photoresistivity of the superlattices in an opposite trend that cannot be achieved in pure single film.
    Citation
    Liu H-J, Wei T-C, Zhu Y-M, Liu R-R, Tzeng W-Y, et al. (2015) Strain-Mediated Inverse Photoresistivity in SrRuO3/La0.7Sr0.3MnO3Superlattices. Advanced Functional Materials 26: 729–737. Available: http://dx.doi.org/10.1002/adfm.201503912.
    Sponsors
    The authors gratefully acknowledge the financial support by the Ministry of Science and Technology under Grant No. MOST 103-2119-M-009-003-MY3 and Academia Sinica Research Program on Nanoscience and Nanotechnology of Taiwan.
    Publisher
    Wiley
    Journal
    Advanced Functional Materials
    DOI
    10.1002/adfm.201503912
    ae974a485f413a2113503eed53cd6c53
    10.1002/adfm.201503912
    Scopus Count
    Collections
    Articles; Electrical and Computer Engineering Program; KAUST Solar Center (KSC); Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division

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