Photoinduced modulation and relaxation characteristics in LaAlO3/SrTiO3 heterointerface

Scientific Reports
K X JinT Wu

Abstract

We report the modulation and relaxation characteristics in the two-dimensional electron gas system at LaAlO3/SrTiO3 heterointerface induced by the ultraviolet light illumination (365 nm). The suppression of Kondo effect at the interface illuminated by the light originates from the light irradiation-induced decoherence effect of localized states. It is interesting to note that the persistent and transient photoinduced effects are simultaneously observed and the photoinduced maximum change values in resistance are 80.8% and 51.4% at T = 20 K, respectively. Moreover, the photoinduced relaxation processes after the irradiation are systematically analyzed using the double exponential model. These results provide the deeper understanding of the photoinduced effect and the experimental evidence of tunable Kondo effect in oxides-based two-dimensional electron gas systems.

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Citations

Aug 31, 2017·Reports on Progress in Physics·Yun-Yi PaiJeremy Levy
Aug 23, 2018·Advanced Materials·Zhen HuangThirumalai Venkatesan
Dec 5, 2019·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Hong YanKexin Jin
Feb 10, 2018·Reports on Progress in Physics·Yun-Yi PaiJeremy Levy
Feb 27, 2021·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Mehwish Khalid ButtKexin Jin
Apr 6, 2018·ACS Applied Materials & Interfaces·Hong YanKexin Jin
Sep 24, 2021·ACS Applied Materials & Interfaces·Jaeyoung JeonHyungwoo Lee

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Methods Mentioned

BETA
irradiating
irradiates
irradiate
electron diffraction

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