中国物理B ›› 2020, Vol. 29 ›› Issue (12): 127304-.doi: 10.1088/1674-1056/abc7b6

所属专题: SPECIAL TOPIC — Twistronics

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  • 收稿日期:2020-06-04 修回日期:2020-09-29 接受日期:2020-11-05 出版日期:2020-12-01 发布日期:2020-11-19

Progress on band structure engineering of twisted bilayer and two-dimensional moirè heterostructures

Wei Yao(姚维)1, Martin Aeschlimann1, and Shuyun Zhou(周树云)2,†   

  1. 1 Department of Physics and Research Center OPTIMAS, University of Kaiserslautern, 67663 Kaiserslautern, Germany; 2 State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing 100084, China
  • Received:2020-06-04 Revised:2020-09-29 Accepted:2020-11-05 Online:2020-12-01 Published:2020-11-19
  • Contact: Corresponding author. E-mail: mjansafi@mail.ustc.edu.cn
  • Supported by:
    W.Y. and M.A. thank B. Stadtmüller (University of Kaiserslautern) for useful discussions. S.Z. acknowledges support from the National Natural Science Foundation of China (Grant No. 11725418), the National Key Research and Development Program of China (Grant No. 2016YFA0301004), Science Challenge Project, China (Grant No. TZ2016004), Beijing Advanced Innovation Center for Future Chip (ICFC), and Tsinghua University Initiative Scientific Research Program. W.Y. and M.A. are funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) -TRR 173 -268565370 (projects A02).

Abstract: Artificially constructed van der Waals heterostructures (vdWHs) provide an ideal platform for realizing emerging quantum phenomena in condensed matter physics. Two methods for building vdWHs have been developed: stacking two-dimensional (2D) materials into a bilayer structure with different lattice constants, or with different orientations. The interlayer coupling stemming from commensurate or incommensurate superlattice pattern plays an important role in vdWHs for modulating the band structures and generating new electronic states. In this article, we review a series of novel quantum states discovered in two model vdWH systems -graphene/hexagonal boron nitride (hBN) hetero-bilayer and twisted bilayer graphene (tBLG), and discuss how the electronic structures are modified by such stacking and twisting. We also provide perspectives for future studies on hetero-bilayer materials, from which an expansion of 2D material phase library is expected.

Key words: twisted bilayer graphene, van der Waals heterostructure, band structure engineering

中图分类号:  (Electron states and collective excitations in multilayers, quantum wells, mesoscopic, and nanoscale systems)

  • 73.21.-b
73.22.Pr (Electronic structure of graphene) 79.60.-i (Photoemission and photoelectron spectra)