气候变化领域集成服务门户(CCPortal): Anisotropic gapping of topological Weyl rings in the charge-density-wave superconductor InxTaSe2

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DOI	10.1016/j.scib.2020.09.007
	Anisotropic gapping of topological Weyl rings in the charge-density-wave superconductor InxTaSe2
	Li Y.; Wu Y.; Xu C.; Liu N.; Ma J.; Lv B.; Yao G.; Liu Y.; Bai H.; Yang X.; Qiao L.; Li M.; Li L.; Xing H.; Huang Y.; Ma J.; Shi M.; Cao C.; Liu Y.; Liu C.; Jia J.; Xu Z.-A.
发表日期	2021
ISSN	20959273
起始页码	243
结束页码	249
卷号	66 期号:3
英文摘要	Topological materials and topological phases have recently become a hot topic in condensed matter physics. In this work, we report an In-intercalated transition-metal dichalcogenide InxTaSe2 (named 112 system), a topological nodal-line semimetal in the presence of both charge density wave (CDW) and superconductivity. In the x = 0.58 sample, the 2×3 commensurate CDW (CCDW) and the 2×2 CCDW are observed below 116 and 77 K, respectively. Consistent with theoretical calculations, the spin–orbital coupling gives rise to two twofold-degenerate nodal rings (Weyl rings) connected by drumhead surface states, confirmed by angle-resolved photoemission spectroscopy. Our results suggest that the 2×2 CCDW ordering gaps out one Weyl ring in accordance with the CDW band folding, while the other Weyl ring remains gapless with intact surface states. In addition, superconductivity emerges at 0.91 K, with the upper critical field deviating from the s-wave behavior at low temperature, implying possibly unconventional superconductivity. Therefore, we think this type of the 112 system may possess abundant physical states and offer a platform to investigate the interplay between CDW, nontrivial band topology and superconductivity. © 2020 Science China Press
关键词	Charge density wave DFT calculations Nodal-line semimetal Superconductivity Weyl rings
英文关键词	Charge density; Indium compounds; Photoelectron spectroscopy; Selenium compounds; Shear waves; Surface states; Tantalum compounds; Temperature; Topology; Transition metals; Angle resolved photoemission spectroscopy; Charge-density-wave superconductors; Theoretical calculations; Topological materials; Topological phasis; Transition metal dichalcogenides; Unconventional superconductivity; Upper critical fields; Charge density waves
语种	英语
来源期刊	Science Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207477
作者单位	Zhejiang Province Key Laboratory of Quantum Technology and Device, Department of Physics, Zhejiang University, Hangzhou, 310027, China; Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai, 200240, China; State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, 310027, China; Shanghai Institute of Applied Physics, CAS, Shanghai, 201204, China; Paul Scherrer Institute, Swiss Light Source, Villigen PSI, CH-5232, Switzerland; Department of Physics, Hangzhou Normal University, Hangzhou, 310036, China; Collaborative Innovation Centre of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
推荐引用方式 GB/T 7714	Li Y.,Wu Y.,Xu C.,et al. Anisotropic gapping of topological Weyl rings in the charge-density-wave superconductor InxTaSe2[J],2021,66(3).
APA	Li Y..,Wu Y..,Xu C..,Liu N..,Ma J..,...&Xu Z.-A..(2021).Anisotropic gapping of topological Weyl rings in the charge-density-wave superconductor InxTaSe2.Science Bulletin,66(3).
MLA	Li Y.,et al."Anisotropic gapping of topological Weyl rings in the charge-density-wave superconductor InxTaSe2".Science Bulletin 66.3(2021).