In collaboration with Prof. Yongbing Xu’s group in School of Electronic Science and Engineering, Nanjing University, and Dr. Bo Liu, and Dr. Hao Meng in Key Laboratory of Spintronics Materials, Devices and Systems of Zhejiang Province, we recently published a paper entitled “Strong interface-induced spin-charge conversion in YIG/Cr heterostructures” in APL [Lijun Ni, Zhendong Chen, Xianyang Lu*, Yu Yan, Lichuan Jin, Jian Zhou, Wencheng Yue, Zhe Zhang, Longlong Zhang, Wenqiang Wang, Yong-Lei Wang, Xuezhong Ruan, Wenqing Liu, Liang He, Rong Zhang, Huaiwu Zhang, Bo Liu, Ronghua Liu*, Hao Meng*, and Yongbing Xu*, Appl. Phys. Lett. 117, 112402 (2020)]. Congratulations to Ms. Lijun Ni. In this work, we have investigated the spin pumping effect of Y3Fe5O12 (YIG)/Cu (t_Cu nm)/Cr heterostructures with the thickness of the Cu interlayer varying from 0.4nm to 5.0 nm by using our home-made CPW broadband FMR spectroscopy. A huge charge signal I_c = 0.239 uA is observed in a YIG/Cr bilayer with direct contact, whereas I_c drops dramatically by two orders of magnitude when thin Cu interlayers down to 0.4 nm are inserted between YIG and Cr. Meanwhile, the injected spin current J_s stays almost invariant for all the heterostructures. The effective spin Hall angle of the YIG/Cr interface is found to be three orders of magnitude larger than the spin Hall angle of the bulk Cr layer in YIG/Cu/Cr. The huge spin-charge conversion efficiency at the YIG/Cr interface is attributed to the inverse Rashba–Edelstein effect. Our experimental results demonstrate the dominant role of the interfacial effect in the spin-charge conversion process of the YIG/Cr heterostructures, suggesting that tailoring the interface of magnetic heterostructures provides an alternative strategy to achieve the higher spin-charge conversion efficiency for the development of low-power consumption spintronic devices. This paper was also selected as an Editor’s Pick.