Strain-mediated inverse photoresistivity in SrRuO3/La0.7Sr0.3 MnO3 superlattices

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

  • Heng-Jui Liu
  • Tzu-Chiao Wei
  • Yuan-Min Zhu
  • Rui-Rui Liu
  • Wen-Yen Tzeng
  • Chih-Ya Tsai
  • Qian Zhan
  • Chih-Wei Luo
  • Pu Yu
  • Ying-Hao Chu
  • Qing He

Detail(s)

Original languageEnglish
Pages (from-to)729-737
Journal / PublicationAdvanced Functional Materials
Volume26
Issue number5
Online published8 Dec 2015
Publication statusPublished - 2 Feb 2016
Externally publishedYes

Abstract

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.

Research Area(s)

  • manganites (La 0.7 Sr 0.3 MnO 3 ), orbital occupancy, photoresistivity, strontium ruthenate (SrRuO 3 ), superlattices

Citation Format(s)

Strain-mediated inverse photoresistivity in SrRuO3/La0.7Sr0.3 MnO3 superlattices. / 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; Chu, Ying-Hao; He, Qing.

In: Advanced Functional Materials, Vol. 26, No. 5, 02.02.2016, p. 729-737.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal