Strain-Mediated Inverse Photoresistivity in SrRuO3/La0.7Sr0.3MnO3Superlattices
| Autor: | Chih-Wei Luo, Heng Jui Liu, Ying-Hao Chu, Pu Yu, Tzu Chiao Wei, Wen Yen Tzeng, Qian Zhan, Qing He, Rui Rui Liu, Jr-Hau He, Yuanmin Zhu, Chih Ya Tsai |
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| Rok vydání: | 2015 |
| Předmět: |
Materials science
Condensed matter physics Magnetoresistance Superlattice Heterojunction 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials Magnetic field Biomaterials Condensed Matter::Materials Science symbols.namesake Electric field 0103 physical sciences Electrochemistry symbols Thin film 010306 general physics 0210 nano-technology Fermi gas Raman scattering |
| Zdroj: | Advanced Functional Materials. 26:729-737 |
| ISSN: | 1616-301X |
| DOI: | 10.1002/adfm.201503912 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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