%0 Journal Article
%A Navarro, H.
%A Basaran, Ali C.
%A Ajejas, F.
%A Fratino, L.
%A Bag, S.
%A Wang, T. D.
%A Qiu, E.
%A Rouco Gómez, Víctor
%A Tenreiro Villar, Isabel
%A Torres, F.
%A Rivera Calzada, Alberto Carlos
%A Santamaría Sánchez-Barriga, Jacobo
%A Rozenberg, M.
%A Schuller, Ivan K.
%T Light-induced decoupling of electronic and magnetic properties in manganites
%D 2023
%U https://hdl.handle.net/20.500.14352/88162
%X The strongly correlated material La_0.7Sr_0.3MnO_3 (LSMO) exhibits metal-to-insulator and magnetic tran-sition near room temperature. Although the physical properties of LSMO can be manipulated by strain, chemical doping, temperature, or magnetic field, they often require large external stimuli. To include addi-tional flexibility and tunability, we developed a hybrid optoelectronic heterostructure that uses photocarrier injection from cadmium sulfide (CdS) to an LSMO layer to change its electrical conductivity. LSMO exhibits no significant optical response; however, the CdS/LSMO heterostructures show an enhanced conductivity, with a resistance drop of about 37%, at the transition temperature under light stimuli. This enhanced conductivity in response to light is comparable to the effect of a 9 T magnetic field in pure LSMO. Surprisingly, the optical and magnetic responses of CdS/LSMO heterostructures are decoupled and exhibit different effects when both stimuli are applied. This unexpected behavior shows that het-erostructuring strongly correlated oxides may require a new understanding of the coupling of physical properties across the transitions and provide the means to implement new functionalities.
%~