Review of photoresponsive properties at SrTiO<sub>3</sub>-based heterointerfaces

Review of photoresponsive properties at SrTiO₃-based heterointerfaces

Yan Hong, Zhang Zhaoting, Wang Shuanhu, Jin Kexin^†

(color online) Resistive responses to electrical and optical stimuli at the LAO/STO interface. (a) A sketch of the experimental set-up. (b) Sheet resistance of a-LAO/STO, recorded in the presence/absence of a light of P = 32 mW (λ =532 nm) while V_G switches among −80 V, 0 V, and +80 V. (c) Enlarged view of the two-step feature of R_S without light illumination. (d) Gate dependence of normalized sheet resistance, , recorded at the time of 300 s after the application of V_G. The arrow marks the R_S corresponding to V_G=−5 V. (e) Sheet resistance of c-LAO/STO, recorded in the presence/absence of a light of P = 32 mW (λ =532 nm) as V_G switches among −200 V, 0 V, and +200 V. All measurements were conducted at room temperature.^{^[20]}