• 文献标题:   Composite super-moire lattices in double-aligned graphene heterostructures
  • 文献类型:   Article
  • 作  者:   WANG ZH, WANG YB, YIN J, TOVARI E, YANG Y, LIN L, HOLWILL M, BIRKBECK J, PERELLO DJ, XU SG, ZULTAK J, GORBACHEV RV, KRETININ AV, TANIGUCHI T, WATANABE K, MOROZOV SV, ANDELKOVIC M, MILOVANOVIC SP, COVACI L, PEETERS FM, MISHCHENKO A, GEIM AK, NOVOSELOV KS, FAL KO VI, KNOTHE A, WOODS CR
  • 作者关键词:  
  • 出版物名称:   SCIENCE ADVANCES
  • ISSN:   2375-2548
  • 通讯作者地址:   Univ Manchester
  • 被引频次:   5
  • DOI:   10.1126/sciadv.aay8897
  • 出版年:   2019

▎ 摘  要

When two-dimensional (2D) atomic crystals are brought into close proximity to form a van der Waals heterostructure, neighbouring crystals may influence each other's properties. Of particular interest is when the two crystals closely match and a moire pattern forms, resulting in modified electronic and excitonic spectra, crystal reconstruction, and more. Thus, moire patterns are a viable tool for controlling the properties of 2D materials. However, the difference in periodicity of the two crystals limits the reconstruction and, thus, is a barrier to the low-energy regime. Here, we present a route to spectrum reconstruction at all energies. By using graphene which is aligned to two hexagonal boron nitride layers, one can make electrons scatter in the differential moire pattern which results in spectral changes at arbitrarily low energies. Further, we demonstrate that the strength of this potential relies crucially on the atomic reconstruction of graphene within the differential moire super cell.