Periodical
Unconventional superconductivity in chiral molecule–TaS2hybrid superlattices
| العنوان: | Unconventional superconductivity in chiral molecule–TaS2hybrid superlattices |
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| المؤلفون: | Wan, Zhong, Qiu, Gang, Ren, Huaying, Qian, Qi, Li, Yaochen, Xu, Dong, Zhou, Jingyuan, Zhou, Jingxuan, Zhou, Boxuan, Wang, Laiyuan, Yang, Ting-Hsun, Sofer, Zdeněk, Huang, Yu, Wang, Kang L., Duan, Xiangfeng |
| المصدر: | Nature; 20240101, Issue: Preprints p1-6, 6p |
| مستخلص: | 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, UPt3and 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 TaS2hybrid 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. |
| قاعدة البيانات: | Supplemental Index |
| تدمد: | 00280836 14764687 |
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| DOI: | 10.1038/s41586-024-07625-4 |