Tuning of the magnetotransport properties of a spin-polarized 2D electron system using visible light - Laboratoire Charles Coulomb (L2C) Access content directly
Journal Articles Scientific Reports Year : 2023

Tuning of the magnetotransport properties of a spin-polarized 2D electron system using visible light

Abstract

We report on the effects of visible light on the low temperature electronic properties of the spinpolarized two dimensional electron system (2DES) formed at the interfaces between LaAlO 3 , EuTiO 3 and (001) SrTiO 3. A strong, persistent modulation of both longitudinal and transverse conductivity was obtained using light emitting diodes (LEDs) with emissions at different wavelengths in the visible spectrum range. In particular, Hall effect data show that visible light induces a non-volatile electron filling of bands with mainly 3d xz,yz character, and at the same time an enhancement of the anomalous Hall effect associated to the magnetic properties of the system. Accordingly, a suppression of the weak-anti localization corrections to the magneto-conductance is found, which correlates with an enhancement of the spin-polarization and of the ferromagnetic character of 2DES. The results establish the LED-induced photo-doping as a viable route for the control of the ground state properties of artificial spin-polarized oxide 2DES.
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Dates and versions

hal-04304328 , version 1 (24-11-2023)

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Maria D’antuono, Yu Chen, Roberta Caruso, Benoit Jouault, Marco Salluzzo, et al.. Tuning of the magnetotransport properties of a spin-polarized 2D electron system using visible light. Scientific Reports, 2023, 13 (1), pp.10050. ⟨10.1038/s41598-023-36957-w⟩. ⟨hal-04304328⟩
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