Nematic Ising superconductivity with hidden magnetism in few-layer 6R-TaS2

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, Wenyu He, Fuqiang Huang (), Yuhang Jiang (), Jinhai Mao, X. C. Xie, Kam Tuen Law and Jian-Hao Chen ()
Additional contact information
Shao-Bo Liu: Peking University
Congkuan Tian: Peking University
Yuqiang Fang: Shanghai Jiao Tong University
Hongtao Rong: Southern University of Science and Technology
Lu Cao: University of Chinese Academy of Sciences
Xinjian Wei: Beijing Academy of Quantum Information Sciences
Hang Cui: Peking University
Mantang Chen: Peking University
Di Chen: Beijing Academy of Quantum Information Sciences
Yuanjun Song: Beijing Academy of Quantum Information Sciences
Jian Cui: Beijing Academy of Quantum Information Sciences
Jiankun Li: Beijing Academy of Quantum Information Sciences
Shuyue Guan: Peking University
Shuang Jia: Peking University
Chaoyu Chen: Southern University of Science and Technology
Wenyu He: ShanghaiTech University
Fuqiang Huang: Shanghai Jiao Tong University
Yuhang Jiang: University of Chinese Academy of Sciences
Jinhai Mao: University of Chinese Academy of Sciences
X. C. Xie: Peking University
Kam Tuen Law: Hong Kong University of Science and Technology
Jian-Hao Chen: Peking University

Nature Communications, 2024, vol. 15, issue 1, 1-8

Abstract: Abstract In van der Waals heterostructures (vdWHs), the manipulation of interlayer stacking/coupling allows for the construction of customizable quantum systems exhibiting exotic physics. An illustrative example is the diverse range of states of matter achieved through varying the proximity coupling between two-dimensional (2D) quantum spin liquid (QSL) and superconductors within the TaS2 family. This study presents a demonstration of the intertwined physics of spontaneous rotational symmetry breaking, hidden magnetism, and Ising superconductivity (SC) in the three-fold rotationally symmetric, non-magnetic natural vdWHs 6R-TaS2. A distinctive phase emerges in 6R-TaS2 below a characteristic temperature (T*) of approximately 30 K, which is characterized by a remarkable set of features, including a giant extrinsic anomalous Hall effect (AHE), Kondo screening, magnetic field-tunable thermal hysteresis, and nematic magneto-resistance. At lower temperatures, a coexistence of nematicity and Kondo screening with Ising superconductivity is observed, providing compelling evidence of hidden magnetism within a superconductor. This research not only sheds light on unexpected emergent physics resulting from the coupling of itinerant electrons and localized/correlated electrons in natural vdWHs but also emphasizes the potential for tailoring exotic quantum states through the manipulation of interlayer interactions.

Date: 2024
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DOI: 10.1038/s41467-024-51631-z

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