| Van der Waals ferromagnetic Josephson junctions | |
| Ai, Linfeng1,2,3; Zhang, Enze1,2; Yang, Jinshan4; Xie, Xiaoyi1,2,3; Yang, Yunkun1,2; Jia, Zehao1,2,3; Zhang, Yuda1,2,3; Liu, Shanshan1,2; Li, Zihan1,2; Leng, Pengliang1,2,3; Cao, Xiangyu1,2,3; Sun, Xingdan5; Zhang, Tongyao6; Kou, Xufeng7; Han, Zheng5,6; Xiu, Faxian1,2,3,8,9; Dong, Shaoming4 | |
| Corresponding Author | Xiu, Faxian(Faxian@fudan.edu.cn) ; Dong, Shaoming(smdong@mail.sic.ac.cn) |
| 2021-11-12 | |
| Source Publication | NATURE COMMUNICATIONS
 |
| Volume | 12Issue:1Pages:9 |
| Abstract | Superconductor-ferromagnet interfaces in two-dimensional heterostructures present a unique opportunity to study the interplay between superconductivity and ferromagnetism. The realization of such nanoscale heterostructures in van der Waals (vdW) crystals remains largely unexplored due to the challenge of making atomically-sharp interfaces from their layered structures. Here, we build a vdW ferromagnetic Josephson junction (JJ) by inserting a few-layer ferromagnetic insulator Cr2Ge2Te6 into two layers of superconductor NbSe2. The critical current and corresponding junction resistance exhibit a hysteretic and oscillatory behavior against in-plane magnetic fields, manifesting itself as a strong Josephson coupling state. Also, we observe a central minimum of critical current in some JJ devices as well as a nontrivial phase shift in SQUID structures, evidencing the coexistence of 0 and pi phase in the junction region. Our study paves the way to exploring sensitive probes of weak magnetism and multifunctional building-blocks for phase-related superconducting circuits using vdW heterostructures. The superconductor-ferromagnet interface provides a unique opportunity to study the interplay between superconductivity and ferromagnetism. Here, the authors build a van der Waals ferromagnetic Josephson junction evidencing a strong 0 and pi phase Josephson coupling. |
| Funding Organization | National Natural Science Foundation of China ; National Key Research and Development Program of China ; Science and Technology Commission of Shanghai ; Shanghai Municipal Science and Technology Major Project ; Program of Shanghai Academic/Technology Research Leader ; China Postdoctoral Innovative Talents Support Program ; China Postdoctoral Science Foundation |
| DOI | 10.1038/s41467-021-26946-w |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[51772310] ; National Natural Science Foundation of China[11934005] ; National Natural Science Foundation of China[11874116] ; National Key Research and Development Program of China[2017YFA0303302] ; National Key Research and Development Program of China[2018YFA0305601] ; Science and Technology Commission of Shanghai[19511120500] ; Shanghai Municipal Science and Technology Major Project[2019SHZDZX01] ; Program of Shanghai Academic/Technology Research Leader[20XD1400200] ; China Postdoctoral Innovative Talents Support Program[BX20190085] ; China Postdoctoral Science Foundation[2019M661331] |
| WOS Research Area | Science & Technology - Other Topics |
| WOS Subject | Multidisciplinary Sciences |
| WOS ID | WOS:000718060500028 |
| Publisher | NATURE PORTFOLIO |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/167569 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Xiu, Faxian; Dong, Shaoming |
| Affiliation | 1.Fudan Univ, State Key Lab Surface Phys, Shanghai 200433, Peoples R China 2.Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China 3.Shanghai Qi Zhi Inst, 41th Floor,AI Tower,701 Yunjin Rd, Shanghai 200232, Peoples R China 4.Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China 5.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 6.Shanxi Univ, Inst Optoelect, State Key Lab Quantum Opt & Quantum Opt Devices, Taiyuan 030006, Peoples R China 7.ShanghaiTech Univ, Sch Informat Sci & Technol, Shanghai 201210, Peoples R China 8.Fudan Univ, Inst Nanoelect Devices & Quantum Comp, Shanghai 200433, Peoples R China 9.Shanghai Res Ctr Quantum Sci, Shanghai 201315, Peoples R China |
| Recommended Citation GB/T 7714 | Ai, Linfeng,Zhang, Enze,Yang, Jinshan,et al. Van der Waals ferromagnetic Josephson junctions[J]. NATURE COMMUNICATIONS,2021,12(1):9. |
| APA | Ai, Linfeng.,Zhang, Enze.,Yang, Jinshan.,Xie, Xiaoyi.,Yang, Yunkun.,...&Dong, Shaoming.(2021).Van der Waals ferromagnetic Josephson junctions.NATURE COMMUNICATIONS,12(1),9. |
| MLA | Ai, Linfeng,et al."Van der Waals ferromagnetic Josephson junctions".NATURE COMMUNICATIONS 12.1(2021):9. |
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