Strain-Mediated Inverse Photoresistivity in SrRuO3/La0.7Sr0.3MnO3Superlattices
Type
ArticleAuthors
Liu, Heng-JuiWei, Tzu-Chiao
Zhu, Yuan-Min
Liu, Rui-Rui
Tzeng, Wen-Yen
Tsai, Chih-Ya
Zhan, Qian
Luo, Chih-Wei
Yu, Pu
He, Jr-Hau

Chu, Ying-Hao

He, Qing
KAUST Department
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) DivisionElectrical Engineering Program
KAUST Solar Center (KSC)
Date
2015-12-08Online Publication Date
2015-12-08Print Publication Date
2016-02Permanent link to this record
http://hdl.handle.net/10754/621507
Metadata
Show full item recordAbstract
© 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
WileyJournal
Advanced Functional Materialsae974a485f413a2113503eed53cd6c53
10.1002/adfm.201503912