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  Orbital-selective two-dimensional superconductivity in 2H−NbS2

Bi, X., Li, Z., Huang, J., Qin, F., Zhang, C., Xu, Z., et al. (2022). Orbital-selective two-dimensional superconductivity in 2H−NbS2. Physical Review Research, 4(1): 013188. doi:10.1103/PhysRevResearch.4.013188.

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Item Permalink: https://hdl.handle.net/21.11116/0000-000A-2080-0 Version Permalink: https://hdl.handle.net/21.11116/0000-000B-F54C-C
Genre: Journal Article

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PhysRevResearch.4.013188.pdf (Publisher version), 3MB
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Supplemental Material: 1. Brillouin zone and Fermi surface sheets; 2. Details for fitting analysis of H_C(); 3. H_(C,)-T relation and analysis of multiband nature; 4. Reproducibility of the H_(C,)-T phase diagram; 5. Multiband analysis based on different definitions of H_C; 6. Experimental results on flakes with gold coating; 7. Phase diagram of temperature-dependent critical current; 8. H_C() under high pressure and its multiband fitting analysis
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 Creators:
Bi, X.1, Author
Li, Z.1, Author
Huang, J.1, Author
Qin, F.1, 2, Author
Zhang, C.1, Author
Xu, Z.3, Author
Zhou, L.1, Author
Tang, M.1, Author
Qiu, C.1, Author
Tang, P.4, 5, 6, Author           
Ideue, T.2, Author
Nojima, T.6, Author
Iwasa, Y.2, Author
Yuan, H.1, Author
Affiliations:
1College of Engineering and Applied Sciences, National Laboratory of Solid State Microstructures and Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, ou_persistent22              
2Quantum Phase Electronic Center and Department of Applied Physics, The University of Tokyo, ou_persistent22              
3School of Materials Science and Engineering, Beihang University, ou_persistent22              
4Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
5Center for Free-Electron Laser Science, ou_persistent22              
6Institute for Materials Research, Tohoku University, ou_persistent22              

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 Abstract: Orbital-selective superconductivity is crucial for understanding the pairing mechanism for multiband superconductors. Atomic d orbitals with anisotropic spatial extension can directly determine the energy dispersion of subbands with two-dimensional (2D) or three-dimensional (3D) nature in band structure. Theoretically, owing to the coexistence of these 2D and 3D subbands, the orbital-selective superconductivity can exhibit band-dependent dimensionality in multiband superconductors. However, to experimentally confirm this orbital-selective 2D superconductivity remains challenging and elusive. Herein, based on angle-dependent upper critical magnetic field on 2H−NbS2 flakes, we observe a cusp peak associated with a 2D superconducting subband from the dxy and dx2−y2 orbitals of Nb atoms, and a round peak related to a 3D subband, directly confirming the existence of intrinsic 2D superconductivity in 2H−NbS2 thick flake and its orbital-selective superconducting nature. The 2D superconductivity remains robust under large electric current or high pressure. Such observations shed light on the orbital-selective pairing mechanism and resulting band-dependent dimensionality for multiband superconductors.

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Language(s): eng - English
 Dates: 2021-10-102022-02-092022-03-082022-01
 Publication Status: Issued
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1103/PhysRevResearch.4.013188
 Degree: -

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Project name : This work was supported by the A3 Foresight Program—Emerging Materials Innovation. The authors would like to acknowledge the support by the National Natural Science Foundation of China (Grants No. 51861145201, No. 91750101, No. 21733001, and No. 52072168), the National Key Basic Research Program of the Ministry of Science and Technology of China (2018YFA0306200), and the Fundamental Research Funds for the Central Universities (Grants No. 021314380078, No. 021314380104, and No. 021314380147). T.I. and Y.I. would also like to acknowledge the A3 Foresight program and KAKENHI Grant No. JP19H05602 from the Japan Society for the Promotion of Science (JSPS). T.N. was supported by JSPS KAKENHI Grant No. JP21H01792. The calculations were supported by the high-performance computing (HPC) resources at Beihang University.
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Title: Physical Review Research
Source Genre: Journal
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Publ. Info: College Park, Maryland, United States : American Physical Society (APS)
Pages: - Volume / Issue: 4 (1) Sequence Number: 013188 Start / End Page: - Identifier: ISSN: 2643-1564
CoNE: https://pure.mpg.de/cone/journals/resource/2643-1564