• 文献标题:   Impacts of in-plane strain on commensurate graphene/hexagonal boron nitride superlattices
  • 文献类型:   Article
  • 作  者:   KHATIBI Z, NAMIRANIAN A, PANAHI SFKS
  • 作者关键词:   graphene/hexagonal boron nitride, strain, electronic propertie, moire pattern
  • 出版物名称:   PHYSICA BCONDENSED MATTER
  • ISSN:   0921-4526 EI 1873-2135
  • 通讯作者地址:   Iran Univ Sci Technol
  • 被引频次:   1
  • DOI:   10.1016/j.physb.2018.11.029
  • 出版年:   2019

▎ 摘  要

Due to atomically thin structure, graphene/hexagonal boron nitride (G/hBN) heterostructures are intensively sensitive to the external mechanical forces and deformations being applied to their lattice structure. In particular, strain can lead to the modification of the electronic properties of G/hBN. Furthermore, moire structures driven by misalignment of graphene and hBN layers introduce new features to the electronic behavior of G/hBN. Utilizing ab initio calculation, we study the strain-induced modification of the electronic properties of diverse stacking faults of G/hBN when applying in-plane strain on both layers, simultaneously. We observe that the interplay of few percent magnitude in-plane strain and moire pattern in the experimentally applicable systems leads to considerable valley drifts, band gap modulation and enhancement of the substrate-induced Fermi velocity renormalization. Furthermore, we find that regardless of the strain alignment, the zigzag direction becomes more efficient for electronic transport, when applying in-plane non-equibiaxial strains.