Electric field control of photoinduced effect in La${}_{0.7}$Sr${}_{0.3}$MnO${}_3$/LaTiO${}_3$/SrTiO${}_3$ heterostructure

Abstract

In this work we have studied the effect of light and electric field on the electrical properties of La0.7Sr0.3MnO3 (LSMO) film at 300 K. Taking advantage of it's charge, spin, orbital and lattice degrees of freedom, we have successfully shown that light and electric field together can be used to tune the resistance states of the manganite system. Using applied gate voltage (Vg) and light we were able to obtain a change in resistance of about +/-7.5%. Furthermore, incorporating an ultra thin interfacial LaTiO3 (LTO) layer provides valuable insight on the origin of the photoinduced effect. The observed photoinduced effect is attributed to photoexcited down spin eg electrons, interfacial charge injection and manipulation of orbital occupancy depending on the gate voltage and wavelength of light.

References in corpus (12)

• Nearly total spin polarization in La2/3Sr1/3MnO3 from tunneling experiments
• The role of oxygen vacancies in SrTiO3 at the LaAlO3/SrTiO3 interface
• Critical thickness and orbital ordering in ultrathin La0.7Sr0.3MnO3 films
• Optical Conductivity of Manganites: Crossover from Jahn-Teller Small Polaron to Coherent Transport in the Ferromagnetic State
• Electron Correlation in Oxygen Vacancy in SrTiO${}_3$
• Electrical manipulation of orbital occupancy and magnetic anisotropy in manganites
• Large increase of the Curie temperature by orbital ordering control
• Visible light enhanced field effect at LaAlO3/SrTiO3 interface
• Reversible modulation of orbital occupations via an interface-induced state in metallic manganites
• Novel photo-conducting state and its perturbation by electrostatic fields in oxide-based two-dimensional electron gas
• Enhanced persistent photoconductivity in $\delta$-doped LaAlO${}_3$/SrTiO${}_3$ heterostructures
• Kondo effect with tunable spin orbit interaction in LaTiO3/CeTiO3/SrTiO3 heterostructure

Cited by in corpus (2)

• Conductance switching at the nanoscale of diarylethene derivatives self-assembled monolayers on La${}_{0.7}$Sr${}_{0.3}$MnO${}_3$
• Ferromagnetism and Metal-Insulator transition in F-doped LaMnO3