| Title | Thermal Spin Injection and Inverse Edelstein Effect of the Two-Dimensional Electron Gas at EuO-KTaO3 Interfaces |
| Authors | Zhang, Hongrui Ma, Yang Zhang, Hui Chen, Xiaobing Wang, Shuanhu Li, Gang Yun, Yu Yan, Xi Chen, Yuansha Hu, Fengxia Cai, Jianwang Shen, Baogen Han, Wei Sun, Jirong |
| Affiliation | Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China Univ Chinese Acad Sci, Sch Phys, Beijing 100049, Peoples R China Peking Univ, Int Ctr Quantum Mat, Sch Phys, Beijing 100871, Peoples R China Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China Northwestern Polytech Univ, Sch Sci, Shanxi Key Lab Condensed Matter Struct & Properti, Xian 710072, Shaanxi, Peoples R China Songshan Lake Mat Lab, Dongguan 523808, Guangdong, Peoples R China |
| Keywords | 2DEG thermal spin injection spin-charge conversion inverse Edelstein effect Rashba spin splitting |
| Issue Date | 2019 |
| Publisher | NANO LETTERS |
| Abstract | With the help of the two-dimensional electron gas (2DEG) at the LaAlO3-SrTiO3 interface, spin and charge currents can be interconverted. However, the conversion efficiency has been strongly depressed by LaAlO3, which blocks spin transmission. It is therefore highly desired to explore 2DEGs sandwiched between ferromagnetic insulators that are transparent for magnons. By constructing epitaxial heterostructure with ferromagnetic EuO, which is conducting for spin current but insulating for electric current, and KTaO3, we successfully obtained the 2DEGs, which can receive thermally injected spin current directly from EuO and convert the spin current to charge current via inverse Edelstein effect of the interface. Strong dependence of the spin Seebeck coefficient on the layer thickness of EuO is further observed and the propagation length for non-equilibrium magnons in EuO has been determined. The present work demonstrates the great potential of the 2DEGs formed by ferromagnetic oxides for spin caloritronics. |
| URI | http://hdl.handle.net/20.500.11897/550213 |
| ISSN | 1530-6984 |
| DOI | 10.1021/acs.nanolett.8b04509 |
| Indexed | SCI(E) EI |
| Appears in Collections: | 量子材料科学中心 |
