Evidence for anisotropic spin-triplet Andreev reflection at the 2D van der Waals ferromagnet/superconductor interface
Abstract
Fundamental symmetry breaking and relativistic spin–orbit coupling give rise to fascinating phenomena in quantum materials. Of particular interest are the interfaces between ferromagnets and common s-wave superconductors, where the emergent spin-orbit fields support elusive spin-triplet superconductivity, crucial for superconducting spintronics and topologically-protected Majorana bound states. Here, we report the observation of large magnetoresistances at the interface between a quasi-two-dimensional van der Waals ferromagnet Fe0.29TaS2 and a conventional s-wave superconductor NbN, which provides the possible experimental evidence for the spin-triplet Andreev reflection and induced spin-triplet superconductivity at ferromagnet/superconductor interface arising from Rashba spin-orbit coupling. The temperature, voltage, and interfacial barrier dependences of the magnetoresistance further support the induced spin-triplet superconductivity and spin-triplet Andreev reflection. This discovery, together with the impressive advances in two-dimensional van der Waals ferromagnets, opens an important opportunity to design and probe superconducting interfaces with exotic properties.
- Authors:
-
[4];
[4];
[1]
- Peking Univ., Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China)
- Wuhan Univ. of Technology (China)
- State Univ. of New York at Buffalo, NY (United States)
- Peking Univ., Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China); University of Chinese Academy of Sciences, Beijing (China); Beijing Academy of Quantum Information Sciences, Beijing (China)
- Publication Date:
- Research Org.:
- State Univ. of New York (SUNY), Amherst, NY (United States); State Univ. of New York at Buffalo, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; National Basic Research Programs of China; National Natural Science Foundation of China (NSFC); Beijing Natural Science Foundation; Key Research Program of the Chinese Academy of Sciences; Hubei Provincial Natural Science Foundation of China
- OSTI Identifier:
- 1831506
- Grant/Contract Number:
- SC0004890; XDB28000000
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nature Communications
- Additional Journal Information:
- Journal Volume: 12; Journal Issue: 1; Journal ID: ISSN 2041-1723
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Cai, Ranran, Yao, Yunyan, Lv, Peng, Ma, Yang, Xing, Wenyu, Li, Boning, Ji, Yuan, Zhou, Huibin, Shen, Chenghao, Jia, Shuang, Xie, X. C., Žutić, Igor, Sun, Qing-Feng, and Han, Wei. Evidence for anisotropic spin-triplet Andreev reflection at the 2D van der Waals ferromagnet/superconductor interface. United States: N. p., 2021.
Web. doi:10.1038/s41467-021-27041-w.
Cai, Ranran, Yao, Yunyan, Lv, Peng, Ma, Yang, Xing, Wenyu, Li, Boning, Ji, Yuan, Zhou, Huibin, Shen, Chenghao, Jia, Shuang, Xie, X. C., Žutić, Igor, Sun, Qing-Feng, & Han, Wei. Evidence for anisotropic spin-triplet Andreev reflection at the 2D van der Waals ferromagnet/superconductor interface. United States. https://doi.org/10.1038/s41467-021-27041-w
Cai, Ranran, Yao, Yunyan, Lv, Peng, Ma, Yang, Xing, Wenyu, Li, Boning, Ji, Yuan, Zhou, Huibin, Shen, Chenghao, Jia, Shuang, Xie, X. C., Žutić, Igor, Sun, Qing-Feng, and Han, Wei. Thu .
"Evidence for anisotropic spin-triplet Andreev reflection at the 2D van der Waals ferromagnet/superconductor interface". United States. https://doi.org/10.1038/s41467-021-27041-w. https://www.osti.gov/servlets/purl/1831506.
@article{osti_1831506,
title = {Evidence for anisotropic spin-triplet Andreev reflection at the 2D van der Waals ferromagnet/superconductor interface},
author = {Cai, Ranran and Yao, Yunyan and Lv, Peng and Ma, Yang and Xing, Wenyu and Li, Boning and Ji, Yuan and Zhou, Huibin and Shen, Chenghao and Jia, Shuang and Xie, X. C. and Žutić, Igor and Sun, Qing-Feng and Han, Wei},
abstractNote = {Fundamental symmetry breaking and relativistic spin–orbit coupling give rise to fascinating phenomena in quantum materials. Of particular interest are the interfaces between ferromagnets and common s-wave superconductors, where the emergent spin-orbit fields support elusive spin-triplet superconductivity, crucial for superconducting spintronics and topologically-protected Majorana bound states. Here, we report the observation of large magnetoresistances at the interface between a quasi-two-dimensional van der Waals ferromagnet Fe0.29TaS2 and a conventional s-wave superconductor NbN, which provides the possible experimental evidence for the spin-triplet Andreev reflection and induced spin-triplet superconductivity at ferromagnet/superconductor interface arising from Rashba spin-orbit coupling. The temperature, voltage, and interfacial barrier dependences of the magnetoresistance further support the induced spin-triplet superconductivity and spin-triplet Andreev reflection. This discovery, together with the impressive advances in two-dimensional van der Waals ferromagnets, opens an important opportunity to design and probe superconducting interfaces with exotic properties.},
doi = {10.1038/s41467-021-27041-w},
journal = {Nature Communications},
number = 1,
volume = 12,
place = {United States},
year = {Thu Nov 18 00:00:00 EST 2021},
month = {Thu Nov 18 00:00:00 EST 2021}
}
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