Exploiting density functional theory and tight-binding calculation, we investigate the impacts of in-plane strain on two different classes of commensurate twisted bilayer graphene (TBG) which are even/odd under sublattice exchange (SE) parity. We find that the SE odd TBG remains gapless whereas ...
When a crystal is subjected to a periodic potential, under certain circumstances it can adjust itself to follow the periodicity of the potential, resulting in a commensurate state. Of particular interest are topological defects between the two commensura
Bernal bilayer graphene exhibits a band gap that is tunable through the infrared with an electric field. We show that sublattice odd commensurate twisted bilayer graphene (C-TBG) exhibits a band gap that is tunable through the terahertz with an electric field. We show that from the perspective...
Twisted bilayer grapheneThermal conductivityPhononMisorientation of two layers of bilayer graphene leaves distinct signatures in the electronic properties and the phonon modes. The effect on the thermal conductivity has received the least attention and is the least well understood. In this work, the in...
Correlated insulating phases of twisted bilayer graphene at commensurate filling fractions: a Hartree-Fock studydoi:10.1103/PhysRevB.102.035136Fuchun ZhangKun JiangYi ZhangZiqiang WangAmerican Physical Society
The interest in these moir茅 superstructures has increased tremendously since the recent observation of a superconducting state (Nature2018, 556, 43-50) and metal-insulator transition (Nature2018, 556, 80-84) in twisted bilayer graphene. In this regard, a straightforward and efficient experimental ...
Twisted bilayer grapheneThermal conductivityPhononMisorientation of two layers of bilayer graphene leaves distinct signatures in the electronic properties and the phonon modes. The effect on the thermal conductivity has received the least attention and is the least well understood. In this work, the in...
graphenegraphitemesoscopicsystemsGraphene and layered materials in general exhibit rich physics and application potential owing to their exceptional electronic properties, which arise from the intricate 蟺-orbital coupling and the symmetry breaking in twisted bilayer systems. Here, we report room-temperature ...