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Unconventional superconductivity in chiral molecule–TaS2 hybrid superlattices

Author

Listed:
  • Zhong Wan

    (University of California, Los Angeles)

  • Gang Qiu

    (University of California, Los Angeles)

  • Huaying Ren

    (University of California, Los Angeles)

  • Qi Qian

    (University of California, Los Angeles)

  • Yaochen Li

    (University of California, Los Angeles)

  • Dong Xu

    (University of California, Los Angeles)

  • Jingyuan Zhou

    (University of California, Los Angeles)

  • Jingxuan Zhou

    (University of California, Los Angeles)

  • Boxuan Zhou

    (University of California, Los Angeles)

  • Laiyuan Wang

    (University of California, Los Angeles)

  • Ting-Hsun Yang

    (University of California, Los Angeles)

  • Zdeněk Sofer

    (University of Chemistry and Technology Prague)

  • Yu Huang

    (University of California, Los Angeles
    University of California, Los Angeles)

  • Kang L. Wang

    (University of California, Los Angeles
    University of California, Los Angeles
    University of California, Los Angeles)

  • Xiangfeng Duan

    (University of California, Los Angeles
    University of California, Los Angeles)

Abstract

Chiral superconductors, a unique class of unconventional superconductors in which the complex superconducting order parameter winds clockwise or anticlockwise in the momentum space1, represent a topologically non-trivial system with intrinsic time-reversal symmetry breaking (TRSB) and direct implications for topological quantum computing2,3. Intrinsic chiral superconductors are extremely rare, with only a few arguable examples, including UTe2, UPt3 and Sr2RuO4 (refs. 4–7). It has been suggested that chiral superconductivity may exist in non-centrosymmetric superconductors8,9, although such non-centrosymmetry is uncommon in typical solid-state superconductors. Alternatively, chiral molecules with neither mirror nor inversion symmetry have been widely investigated. We suggest that an incorporation of chiral molecules into conventional superconductor lattices could introduce non-centrosymmetry and help realize chiral superconductivity10. Here we explore unconventional superconductivity in chiral molecule intercalated TaS2 hybrid superlattices. Our studies reveal an exceptionally large in-plane upper critical field Bc2,|| well beyond the Pauli paramagnetic limit, a robust π-phase shift in Little–Parks measurements and a field-free superconducting diode effect (SDE). These experimental signatures of unconventional superconductivity suggest that the intriguing interplay between crystalline atomic layers and the self-assembled chiral molecular layers may lead to exotic topological materials. Our study highlights that the hybrid superlattices could lay a versatile path to artificial quantum materials by combining a vast library of layered crystals of rich physical properties with the nearly infinite variations of molecules of designable structural motifs and functional groups11.

Suggested Citation

  • Zhong Wan & Gang Qiu & Huaying Ren & Qi Qian & Yaochen Li & Dong Xu & Jingyuan Zhou & Jingxuan Zhou & Boxuan Zhou & Laiyuan Wang & Ting-Hsun Yang & Zdeněk Sofer & Yu Huang & Kang L. Wang & Xiangfeng D, 2024. "Unconventional superconductivity in chiral molecule–TaS2 hybrid superlattices," Nature, Nature, vol. 632(8023), pages 69-74, August.
  • Handle: RePEc:nat:nature:v:632:y:2024:i:8023:d:10.1038_s41586-024-07625-4
    DOI: 10.1038/s41586-024-07625-4
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    Cited by:

    1. Shao-Bo Liu & Congkuan Tian & Yuqiang Fang & Hongtao Rong & Lu Cao & Xinjian Wei & Hang Cui & Mantang Chen & Di Chen & Yuanjun Song & Jian Cui & Jiankun Li & Shuyue Guan & Shuang Jia & Chaoyu Chen & W, 2024. "Nematic Ising superconductivity with hidden magnetism in few-layer 6R-TaS2," Nature Communications, Nature, vol. 15(1), pages 1-8, December.

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