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Finite-momentum Cooper pairing in proximitized altermagnets

Author

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  • Song-Bo Zhang

    (Hefei National Laboratory
    University of Science and Technology of China
    University of Zürich)

  • Lun-Hui Hu

    (Aalto University School of Science
    Zhejiang University
    The University of Tennessee)

  • Titus Neupert

    (University of Zürich)

Abstract

Finite-momentum Cooper pairing is an unconventional form of superconductivity that is widely believed to require finite magnetization. Altermagnetism is an emerging magnetic phase with highly anisotropic spin-splitting of specific symmetries, but zero net magnetization. Here, we study Cooper pairing in metallic altermagnets connected to conventional s-wave superconductors. Remarkably, we find that the Cooper pairs induced in the altermagnets acquire a finite center-of-mass momentum, despite the zero net magnetization in the system. This anomalous Cooper-pair momentum strongly depends on the propagation direction and exhibits unusual symmetric patterns. Furthermore, it yields several unique features: (i) highly orientation-dependent oscillations in the order parameter, (ii) controllable 0-π transitions in the Josephson supercurrent, (iii) large-oblique-angle Cooper-pair transfer trajectories in junctions parallel with the direction where spin splitting vanishes, and (iv) distinct Fraunhofer patterns in junctions oriented along different directions. Finally, we discuss the implementation of our predictions in candidate materials such as RuO2 and KRu4O8.

Suggested Citation

  • Song-Bo Zhang & Lun-Hui Hu & Titus Neupert, 2024. "Finite-momentum Cooper pairing in proximitized altermagnets," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-45951-3
    DOI: 10.1038/s41467-024-45951-3
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    1. Puhua Wan & Oleksandr Zheliuk & Noah F. Q. Yuan & Xiaoli Peng & Le Zhang & Minpeng Liang & Uli Zeitler & Steffen Wiedmann & Nigel E. Hussey & Thomas T. M. Palstra & Jianting Ye, 2023. "Orbital Fulde–Ferrell–Larkin–Ovchinnikov state in an Ising superconductor," Nature, Nature, vol. 619(7968), pages 46-51, July.
    2. R. S. Keizer & S. T. B. Goennenwein & T. M. Klapwijk & G. Miao & G. Xiao & A. Gupta, 2006. "A spin triplet supercurrent through the half-metallic ferromagnet CrO2," Nature, Nature, vol. 439(7078), pages 825-827, February.
    3. Lev B. Ioffe & Vadim B. Geshkenbein & Mikhail V. Feigel'man & Alban L. Fauchère & Gianni Blatter, 1999. "Environmentally decoupled sds -wave Josephson junctions for quantum computing," Nature, Nature, vol. 398(6729), pages 679-681, April.
    4. Ding-Fu Shao & Shu-Hui Zhang & Ming Li & Chang-Beom Eom & Evgeny Y. Tsymbal, 2021. "Spin-neutral currents for spintronics," Nature Communications, Nature, vol. 12(1), pages 1-8, December.
    5. Makoto Naka & Satoru Hayami & Hiroaki Kusunose & Yuki Yanagi & Yukitoshi Motome & Hitoshi Seo, 2019. "Spin current generation in organic antiferromagnets," Nature Communications, Nature, vol. 10(1), pages 1-8, December.
    6. Angela Q. Chen & Moon Jip Park & Stephen T. Gill & Yiran Xiao & Dalmau Reig-i-Plessis & Gregory J. MacDougall & Matthew J. Gilbert & Nadya Mason, 2018. "Finite momentum Cooper pairing in three-dimensional topological insulator Josephson junctions," Nature Communications, Nature, vol. 9(1), pages 1-9, December.
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