Coexistence of Quasi-two-dimensional Superconductivity and Tunable Kondo Lattice in a van der Waals Superconductor
2022-05-25
发表期刊CHINESE PHYSICS LETTERS (IF:3.5[JCR-2023],2.1[5-Year])
ISSN0256-307X
EISSN1741-3540
卷号39期号:7页码:077401
发表状态已发表
DOI10.1088/0256-307X/39/7/077401
摘要

Realization of Kondo lattice in superconducting van der Waals materials not only provides a unique opportunity for tuning the Kondo lattice behavior by electrical gating or intercalation, but also is helpful for further understanding the heavy fermion superconductivity. Here we report a low-temperature and vector-magnetic-field scanning tunneling microscopy and spectroscopy study on a superconducting compound (4Hb-TaS2) with alternate stacking of 1T-TaS2 and 1H-TaS2 layers. We observe the quasi-two-dimensional superconductivity in the 1H-TaS2 layer with anisotropic response to the in-plane and out-of-plane magnetic fields. In the 1T-TaS2 layer, we detect the Kondo resonance peak that results from the Kondo screening of the unpaired electrons in the Star-of-David clusters. We also find that the intensity of the Kondo resonance peak is sensitive to its relative position with the Fermi level, and it can be significantly enhanced when it is further shifted towards the Fermi level by evaporating Pb atoms onto the 1T-TaS2 surface. Our results not only are important for fully understanding the electronic properties of 4Hb-TaS2, but also pave the way for creating tunable Kondo lattice in the superconducting van der Waals materials.

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收录类别SCI ; SCIE ; EI
语种英语
资助项目National Key R&D Program of China[2020YFA0309602] ; National Natural Science Foundation of China[11874042,12004250,12004251,11674326,11774351,
WOS研究方向Physics
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000816877800001
出版者IOP Publishing Ltd
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文献类型期刊论文
条目标识符https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/203439
专题物质科学与技术学院_博士生
物质科学与技术学院_PI研究组_颜世超组
物质科学与技术学院_PI研究组_李军组
物质科学与技术学院_PI研究组_张石磊组
通讯作者Sun, Yuping; Yan, Shichao
作者单位
1.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China
2.Chinese Acad Sci, HFIPS, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China
3.Univ Sci & Technol China, Hefei 230026, Peoples R China
4.ShanghaiTech Univ, ShanghaiTech Lab Topol Phys, Shanghai 201210, Peoples R China
5.Chinese Acad Sci, High Field Magnet Lab, HFIPS, Hefei 230031, Peoples R China
6.Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Peoples R China
第一作者单位物质科学与技术学院
通讯作者单位物质科学与技术学院;  上海科技大学
第一作者的第一单位物质科学与技术学院
推荐引用方式
GB/T 7714
Shen, Shiwei,Qin, Tian,Gao, Jingjing,et al. Coexistence of Quasi-two-dimensional Superconductivity and Tunable Kondo Lattice in a van der Waals Superconductor[J]. CHINESE PHYSICS LETTERS,2022,39(7):077401.
APA Shen, Shiwei.,Qin, Tian.,Gao, Jingjing.,Wen, Chenhaoping.,Wang, Jinghui.,...&Yan, Shichao.(2022).Coexistence of Quasi-two-dimensional Superconductivity and Tunable Kondo Lattice in a van der Waals Superconductor.CHINESE PHYSICS LETTERS,39(7),077401.
MLA Shen, Shiwei,et al."Coexistence of Quasi-two-dimensional Superconductivity and Tunable Kondo Lattice in a van der Waals Superconductor".CHINESE PHYSICS LETTERS 39.7(2022):077401.
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