中国科学:物理学 力学 天文学(英文版)2024，Vol.67Issue(4) ：138-145.DOI:10.1007/s11433-023-2320-7

Experimental observation of multiple topological nodal structure in LaSb2

Yuxi Qiao Fuyi Wang Huaiqiang Wang Zicheng Tao Zhicheng Jiang Zhengtai Liu Soohyun Cho Fayuan Zhang Qingkai Meng Wei Xia Yichen Yang Zhe Huang Jishan Liu Zhonghao Liu Zengwei Zhu Shan Qiao Yanfeng Guo Haijun Zhang Dawei Shen
中国科学:物理学 力学 天文学(英文版)2024，Vol.67Issue(4) ：138-145.DOI:10.1007/s11433-023-2320-7
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Experimental observation of multiple topological nodal structure in LaSb2

Yuxi Qiao 1Fuyi Wang 2Huaiqiang Wang 3Zicheng Tao 4Zhicheng Jiang 5Zhengtai Liu 6Soohyun Cho 5Fayuan Zhang 7Qingkai Meng 8Wei Xia 9Yichen Yang 5Zhe Huang 10Jishan Liu 6Zhonghao Liu 11Zengwei Zhu 8Shan Qiao 12Yanfeng Guo 9Haijun Zhang 13Dawei Shen14
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作者信息

  • 1. State Key Laboratory of Functional Materials for Informatics,Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences,Shanghai 200050,China;National Synchrotron Radiation Laboratory,and School of Nuclear Science and Technology,University of Science and Technology of China,Hefei 230026,China
  • 2. National Laboratory of Solid State Microstructures,School of Physics,Nanjing University,Nanjing 210093,China
  • 3. School of Physics and Technology,Nanjing Normal University,Nanjing 210023,China
  • 4. School of Physical Science and Technology,ShanghaiTech University,Shanghai 201210,China
  • 5. State Key Laboratory of Functional Materials for Informatics,Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences,Shanghai 200050,China
  • 6. State Key Laboratory of Functional Materials for Informatics,Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences,Shanghai 200050,China;National Synchrotron Radiation Laboratory,and School of Nuclear Science and Technology,University of Science and Technology of China,Hefei 230026,China;Shanghai Synchrotron Radiation Facility,Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201210,China
  • 7. State Key Laboratory of Functional Materials for Informatics,Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences,Shanghai 200050,China;Shenzhen Institute for Quantum Science and Engineering,Southern University of Science and Technology,Shenzhen 518055,China
  • 8. Wuhan National High Magnetic Field Center and School of Physics,Huazhong University of Science and Technology,Wuhan 430074,China
  • 9. School of Physical Science and Technology,ShanghaiTech University,Shanghai 201210,China;ShanghaiTech Laboratory for Topological Physics,ShanghaiTech University,Shanghai 201210,China
  • 10. State Key Laboratory of Functional Materials for Informatics,Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences,Shanghai 200050,China;School of Physical Science and Technology,ShanghaiTech University,Shanghai 201210,China
  • 11. Institute of High-Pressure Physics & School of Physical Science and Technology,Ningbo University,Ningbo 315211,China
  • 12. State Key Laboratory of Functional Materials for Informatics,Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences,Shanghai 200050,China;National Synchrotron Radiation Laboratory,and School of Nuclear Science and Technology,University of Science and Technology of China,Hefei 230026,China;School of Physical Science and Technology,ShanghaiTech University,Shanghai 201210,China
  • 13. National Laboratory of Solid State Microstructures,School of Physics,Nanjing University,Nanjing 210093,China;Collaborative Innovation Center of Advanced Microstructures,Nanjing University Nanjing 210093,China
  • 14. Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China
  • 折叠

Abstract

Unconventional fermions in the immensely studied topological semimetals are the source for rich exotic topological properties.Here,using symmetry analysis and first-principles calculations,we propose the coexistence of multiple topological nodal struc-ture in LaSb2,including topological nodal surfaces,nodal lines and in particular eightfold degenerate nodal points,which have been scarcely observed in a single material.Further,utilizing angle-resolved photoemission spectroscopy,we confirm the exis-tence of nodal surfaces and eightfold degenerate nodal points in LaSb2.The intriguing multiple topological nodal structure might play a crucial role in giving rise to the large linear magnetoresistance.Our work renews the insights into the exotic topological phenomena in LaSb2.

Key words

eightfold degenerate points/multiple topological nodal structure/angle-resolved photoemission spectroscopy/linear unsaturated magnetoresistance

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基金项目

国家重点研发计划(2023YFA1406304)

国家自然科学基金(U2032208)

国家自然科学基金(12222413)

国家自然科学基金(11874264)

国家自然科学基金(12074181)

国家自然科学基金(11834006)

国家自然科学基金(12104217)

上海市自然科学基金(23ZR1482200)

上海市自然科学基金(22ZR1473300)

上海市自然科学基金(14ZR1447600)

Shanghai Science and Technology Innovation Action Plan(21JC1402000)

Open Projects from State Key Laboratory of Functional Materials for Informatics(SKL2022)

Double First-Class Initiative Fund of Shanghai Tech University()

fund of Science and Technology on Surface Physics and Chemistry Laboratory(6142A02200102)

this research used Beamline 03U of the Shanghai Synchrotron Radiation Facility()

ME2 Project from the National Natural Science Foundation of China(11227902)

National Key Projects for Research and Development of China(2021YFA1400400)

中央高校基本科研业务费专项(020414380185)

江苏省自然科学基金(BK20200007)

霍英东教育基金(161006)

出版年

2024
中国科学:物理学 力学 天文学(英文版)
中国科学院

中国科学:物理学 力学 天文学(英文版)

CSTPCD
影响因子：0.91
ISSN：1674-7348
参考文献量62
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