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李思宇

发布于:2020-11-25 星期三 10:54:30  点击数:9797

副教授,湖南大学“岳麓学者”

研究领域:二维材料的制备、新奇电学性质的探测和应用

欢迎具有物理、材料背景的本科生/硕士/博士/博士后加盟

联系方式:lisiyu@hnu.edu.cn


基本信息

李思宇,理学博士,湖南大学材料科学与工程学院副教授,湖南大学“岳麓学者”,湖南省优青。

2015年本科毕业于北京师范大学物理学系获理学学士学位,同年直博,2020年博士毕业于北京师范大学物理学系凝聚态物理专业,获理学博士学位,并获得“北京师范大学优秀毕业生”及“北京市优秀毕业生”称号。2020年6月入职湖南大学材料科学与工程学院工作。

主要研究领域为二维材料的制备、新奇电学性质的探测和应用,近年来在该领域发表SCI论文二十余篇,包括Phys. Rev. Lett.,Nature Electron.,Nano Lett.,Phys. Rev. B等。


教育背景

2015-2020:北京师范大学,物理学系,凝聚态物理专业,博士,导师:何林教授

2011-2015:北京师范大学,物理学系,物理学专业,学士


工作履历

2020.6-今:湖南大学材料科学与工程学院,副教授


研究概况

近年来,利用扫描隧道显微镜(STM)在二维材料新奇量子物态研究领域取得了一系列科研成果,共发表SCI论文30余篇,其中以第一作者和共同第一作者身份发表论文13篇(包括3篇Physical Review Letters,8篇Physical Review B、1篇2D Materials和1篇Physical Review Applied),多次参加Graphene Week、凝聚态物理会议、物理年会等国际国内学术会议并作口头报告。主要研究工作包括:

(1)石墨烯中谷电子学的研究:利用磁场和赝磁场共同作用、利用磁场调控双层石墨烯Berry相位,在石墨烯中单电子精度上实现了谷极化和谷翻转;

(2)石墨烯平带中强关联物态的研究:通过小转角双层石墨烯、ABC三层石墨烯、垂直外磁场在石墨烯体系中引入平带,率先利用STM探测了这些平带中的强关联物态,包括轨道铁磁态、量子霍尔铁磁态等;

3)发展了一套在纳米尺度单电子精度上探测体系简并度的方法——Edge-free量子点法,该方法具有普适性,可用于探测不同二维材料体系的对称性破缺态。


主持和参与项目:

  1. 国家自然科学基金委青年科学基金,纳米尺度内单层过渡金属硫族化合物谷赝自旋调控的研究,2022.1-2024.12,在研,主持;

  2. 湖南省自然科学基金委优秀青年科学基金,二维材料中新奇量子物态的探测与调控,2021.1-2023.12,在研,主持;

  3. 国家自然科学基金委面上项目,纳米尺度内石墨烯中自旋和谷赝自旋的极化和翻转研究,2020.1-2023.12,在研,参与;

  4. 国家自然科学基金委面上项目,双层石墨烯中AB-BA畴界及其新奇拓扑边界态的研究,2017.1-2020.12,结题,参与。

学术成果

1.   K.-H. Li, F.-P. Xiao, W. Guan, Y.-L. Xiao, C. Xu, J.-D. Zhang, C.-F. Lin, D. Li, Q.-J. Tong#S.-Y. Li#, A.-L. Pan#, Morphology deformation and giant electronic band modulation in longwavelength WS2 moiré superlattices, Nano Lett. 22, 5997-6003 (2022).

2.   S.-Y. Li#, Lin He#, Recent progresses of quantum confinement in graphene quantum dots, Frontiers of Physics 17, 33201 (2022). 

3.   L. Liu, L. Kong, Q. Li, C. He, L. Ren, Q. Tao, X. Yang, J. Lin, B. Zhao, Z. Li, Y. Chen, W. Li, W. Song, Z. Lu, G. Li, S.-Y. Li, X. Duan, A. L. Pan, L. Liao, Y. Liu, Transferred van der Waals metal electrodes for sub-1-nm MoS2 vertical transistors, Nature Electronics 4, 342-347 (2021).

4.   Y.-N. Ren, Q. Cheng, S.-Y. Li, C. Yan, Y.-W. Liu, K. Lv, M.-H. Zhang, Q.-F. Sun, L. He, Spatial and magnetic confinement of massless Dirac fermions, Phys. Rev. B 104, L161408 (2021).

5.   S.-Y. Li, Y. Su, Y.-N. Ren, L. He, Valley polarization and inversion in strained graphene via pseudo-Landau levels, valley splitting of real Landau levels, and confined states, Phys. Rev. Lett. 124, 106802 (2020).

6.   Y.-W. Liu*, Z. Hou*, S.-Y. Li*, Q.-F. Sun, L. He, Movable valley switch driven by Berry phase in bilayer-graphene resonators, Phys. Rev. Lett. 124, 166801 (2020). (并列一作)

7.   S.-Y. Li, Y. Zhang, Y.-N. Ren, J. Liu, X. Dai, L. He, Experimental evidence for orbital magnetic moments generated by moiré-scale current loops in twisted bilayer graphene, Phys. Rev. B 102, 121406(R) (2020). (Editors’ Suggestion)

8.   S.-Y. Li, Y. Zhang, L.-J. Yin, L. He, Scanning tunneling microscope study of quantum Hall isospin ferromagnetic states in the zero Landau level in a graphene monolayer, Phys. Rev. B 100, 085437 (2019).

9.   S.-Y. Li, Y.-N. Ren, Y.-W. Liu, M.-X. Chen, H. Jiang, L. He, Nanoscale detection of valley-dependent spin splitting around atomic defects of graphene, 2D Mater. 6, 031005 (2019).

10.  S.-Y. Li, K.-K. Bai, W.-J. Zuo, Y.-W. Liu, Z.-Q. Fu, W.-X. Wang, Yu. Zhang, L.-J. Yin, J.-B. Qiao, L. He, Tunneling spectra of a quasi-freestanding graphene monolayer, Phys. Rev. Appl. 9, 054031 (2018).

11.  S.-Y. Li, H. Liu, J.-B. Qiao, H. Jiang, L. He, Magnetic-field-controlled negative differential conductance in scanning tunneling spectroscopy of graphene npn junction resonators, Phys. Rev. B 97, 115442 (2018).

12.  S.-Y. Li, K.-Q. Liu, L.-J. Yin, W.-X. Wang, W. Yan, X.-Q. Yang, J.-K. Yang, H. Liu, H. Jiang, L. He, Splitting of Van Hove singularities in slightly twisted bilayer graphene, Phys. Rev. B 96, 155416 (2017).

13.  S.-Y. Li, M. Zhou, J.-B. Qiao, W. Duan, L. He, Wide-band-gap wrinkled nanoribbon-like structures in a continuous metallic graphene sheet, Phys. Rev. B 94, 085419 (2016).

14.  Y. Zhang*, S.-Y. Li*, H. Huang, W.-T. Li, J.-B. Qiao, W.-X. Wang, L.-J. Yin, K.-K. Bai, W. Duan, L. He, Scanning tunneling microscopy of the p magnetism of a single carbon vacancy in graphene, Phys. Rev. Lett. 117, 166801 (2016). (并列一作)

15.  W. Yan*, S.-Y. Li*, L. J. Yin, J. B. Qiao, J.-C. Nie, and L. He, Spatially resolving unconventional interface Landau quantization in a graphene monolayer-bilayer planar junction, Phys. Rev. B 93, 195408 (2016). (并列一作)

16.  S.-Y. Li, K.-K. Bai, L.-J. Yin, J.-B. Qiao, W.-X. Wang, L. He, Observation of unconventional splitting of Landau levels in strained graphene, Phys. Rev. B 92, 245302 (2015).

17.   L.-J. Yin*, S.-Y. Li*, J.-B. Qiao, J.-C. Nie, L. He, Landau quantization in graphene monolayer, Bernal bilayer, and Bernal trilayer on graphite surface, Phys. Rev. B 91, 115405 (2015). (并列一作)

18.   Y.-N. Ren, C. Lu, Y. Zhang, S.Y. Li, Y.-W. Liu, C. Yan, Z.-H. Guo, C.-C. Liu, F. Yang, L. He, Spectroscopic evidence for a spin and valley polarized metallic state in a non-magic-angle twisted bilayer graphene, ACS Nano 14, 13081 (2020).

19.   Y. Zhang, Z. Hou, Y.-X. Zhao, Z.-H. Guo, Y.-W. Liu, S.-Y. Li, Y.-N. Ren, Q.-F. Sun, L. He, Correlation-induced valley splitting and orbital magnetism in strain-induced zero-energy flat band in twisted bilayer graphene near the magic angle, Phys. Rev. B 102, 081403 (2020).

20.   L.-J. Yin, L.-J. Shi, S.-Y. Li, Y. Zhang, Z.-H. Guo, and L. He, High-magnetic field tunneling spectra of ABC-stacked trilayer graphene on graphite, Phys. Rev. Lett. 122, 146802 (2019).

21.   C. Yan, D. Ma, J. Qiao, H. Zhong, L. Yang, S.-Y. Li, Z.-Q. Fu, Y. Zhang, L. He, Scanning tunneling microscopy study of the quasicrystalline 30o twisted bilayer graphene, 2D Mater. 6, 045041 (2019).

22.   Y.-W. Liu, J.-B. Qiao, C. Yan, Y. Zhang, S.-Y. Li, L. He, Magnetism near half-filling of a van Hove singularity in twisted graphene bilayer, Phys. Rev. B 99, 201408 (Rapid Communications) (2019).

23.   W.-X. Wang, Y.-W. Wei, S.-Y. Li, X. Q. Li, X. S. Wu, J. Feng, L. He, Imaging the dynamics of individual hydrogen atom intercalated between two graphene sheets, Phys. Rev. B 97, 085407 (2018).

24.   W.-X. Wang, H. Jiang, Y. Zhang, S.-Y. Li, H. Liu, X.-Q. Li, X.-S. Wu, L. He, Scanning tunneling microscopy and spectroscopy of finite-size twisted bilayer graphene, Phys. Rev. B 96, 115434 (2017).

25.   L.-J. Yin, K.-K. Bai, W.-X. Wang, S.-Y. Li, Y. Zhang, L. He, Landau quantization of Dirac fermions in graphene and its multilayers, Front. Phys. 12, 127408 (2017).

26.   W.-X. Wang, M. Zhou, X.-Q. Li, S.-Y. Li, X.-S. Wu, W.-H. Duan, L. He, Energy gaps of atomically precise armchair graphene nanoribbons, Phys. Rev. B 93, 241403 (Rapid Communications) (2016).

27.   L.-J. Yin, Y. Zhang, J. B. Qiao, S.-Y. Li, L. He, Experimental observation of surface states and Landau levels bending in bilayer graphene, Phys. Rev. B 93, 125422 (2016).

28.   K.-K. Bai, Y.-C. Wei, J. B. Qiao, S.-Y. Li, L.-J. Yin, W. Yan, J.-C. Nie, L. He, Detecting giant electron-hole asymmetry in graphene monolayer generated by strain and charge-defect scattering via Landau level spectroscopy, Phys. Rev. B 92, 121405 (Rapid Communications) (2015).

29.   W.-X. Wang, L.-J. Yin, J.-B. Qiao, T. C. Cai, S.-Y. Li, R.-F. Dou, J.-C. Nie, X.-S. Wu, L. He, Atomic resolution imaging of the two-component Dirac-Landau levels in a gapped graphene monolayer, Phys. Rev. B 92, 165420 (2015).

奖励与荣誉

  1. 2021年湖南省“优青”

  2. 2020年北京市优秀毕业生

  3. 2020年北京师范大学优秀毕业生

  4. 2016-2019年连续四年获得研究生国家奖学金