Strain-engineered long-distance supercurrent in an altermagnetic CrSb based-Josephson junction
Abstract
Altermagnetic materials, characterized by vanishing net magnetization and momentum-dependent spin splitting, provide a unique platform for realizing unconventional superconducting states without the detrimental stray fields. Here, we demonstrate long-distance Josephson supercurrent transport through epitaxial thin films of the strained altermagnet CrSb. We observe a dissipationless supercurrent across a lateral spacer distance of 150 nm in a CrSb-based Josephson junction, exceeding the conventional spin-singlet coherence length by nearly two orders of magnitude. This supercurrent is further accompanied by a well-defined magnetic-field-induced quantum interference pattern, providing direct evidence for genuine Josephson coupling. Our results reveal altermagnets as a promising route toward generating long-distance supercurrents without macroscopic magnetic stray fields, opening new opportunities for superconducting spintronic applications.
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BibTeX
@misc{gao2026strainengineered,
title = {{Strain-engineered long-distance supercurrent in an altermagnetic CrSb based-Josephson junction}},
author = {Yifan Gao and Jin Yan and Junjie Wei and Yifan Zhang and Zhiyuan Zhou and Tong Zou and Ruiyue Chu and Gui Wang and Kaiwen Shen and Zhiwei Zhang and Fang Chen and Yingfen Wei and Hao Jiang and Xumeng Zhang and Ming Wang and Liyang Liao and Jingli Wang and Yijun Yu and Wu Shi and Qi Yao and Xiaobing Chen and Qihang Liu and Yizheng Wu and Yuhang Li and Xufeng Kou and Cheng Song and Xianzhe Chen and Qi Liu and Xincheng Xie and Ming Liu},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.11341},
eprint = {2610.11341},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.11341},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Strain-engineered long-distance supercurrent in an altermagnetic CrSb based-Josephson junction
AU - Yifan Gao
AU - Jin Yan
AU - Junjie Wei
AU - Yifan Zhang
AU - Zhiyuan Zhou
AU - Tong Zou
AU - Ruiyue Chu
AU - Gui Wang
AU - Kaiwen Shen
AU - Zhiwei Zhang
AU - Fang Chen
AU - Yingfen Wei
AU - Hao Jiang
AU - Xumeng Zhang
AU - Ming Wang
AU - Liyang Liao
AU - Jingli Wang
AU - Yijun Yu
AU - Wu Shi
AU - Qi Yao
AU - Xiaobing Chen
AU - Qihang Liu
AU - Yizheng Wu
AU - Yuhang Li
AU - Xufeng Kou
AU - Cheng Song
AU - Xianzhe Chen
AU - Qi Liu
AU - Xincheng Xie
AU - Ming Liu
PY - 2026
DA - 2026/10/08
PB - arXiv
DO - 10.48550/arxiv.2610.11341
UR - https://arxiv.org/abs/2610.11341
AB - Altermagnetic materials, characterized by vanishing net magnetization and momentum-dependent spin splitting, provide a unique platform for realizing unconventional superconducting states without the detrimental stray fields. Here, we demonstrate long-distance Josephson supercurrent transport through epitaxial thin films of the strained altermagnet CrSb. We observe a dissipationless supercurrent across a lateral spacer distance of 150 nm in a CrSb-based Josephson junction, exceeding the conventional spin-singlet coherence length by nearly two orders of magnitude. This supercurrent is further accompanied by a well-defined magnetic-field-induced quantum interference pattern, providing direct evidence for genuine Josephson coupling. Our results reveal altermagnets as a promising route toward generating long-distance supercurrents without macroscopic magnetic stray fields, opening new opportunities for superconducting spintronic applications.
ER -