The electronic band structure of bilayer graphene is studied systematically in the presence of substitutional B and/or N doping, using density functional theory with van der Waals correction. We show that introduction of B-N pairs into bilayer graphene can be used to create a substantial band ...
Band structure with LCAO Monolayer Linear combination of atomic orbitals(LCAO)可以用作近似来计算能带结构。我们用它来考虑二维石墨烯的能带。 石墨烯中,碳原子有 4 个价电子,其中 3 个用于形成 sp2键,剩余的一个电子的 π键是我们关心的。单个 unit-cell 中有两个电子,因此有两个 π键,分别称为 π和π...
Band structureA perpendicular electric field breaks the layer symmetry of Bernal-stacked bilayer graphene, resulting in the opening of a band gap and a modification of the effective mass of the charge carriers. Using scanning tunneling microscopy and spectroscopy, we examine standing waves in the ...
Bernal bilayer graphene (BLG) offers a highly flexible platform for tuning the band structure, featuring two distinct regimes. One is a tunable band gap induced by large displacement fields. Another is a gapless metallic band occurring at low fields, featuring rich fine structure consisting of four...
In bilayer graphene, when the trigonal warping effect is taken into account, this new Rabi frequency shows a zero non-trivial minimum as a function of the strength of the applied electric field in addition to the trivial minimum at zero field. The zero non-trivial minimum occurs where the '...
关于Twisted Bilayer Graphene(TGB)的哈密顿量推导,可直接参看Bistritzer和MacDonald在PNAS上的原文。更详细的推导可以参照发表在Wiley Online Library上的Handbook of Graphene Set-Vol8-chapter6。(其第八卷第六章也即里斯本大学的G.Catarina的硕士毕业论文)。总得来说在写TGB的哈密顿量时,有两个关键的点,一是对...
Solid-state nanopores in graphene, in particular, hold much promise, as the spacing between nucleotides in single-stranded DNA (ssDNA) is 0.32–0.52 nm, which is comparable to the “thickness” of single- and bilayer graphene (0.34–0.68 nm), making this material very attractive for electronic...
Bilayer graphene possesses quadric dispersion bands at the EF with zero band gap, rather than the linear dispersion band, that are tunable from metallic to semiconducting by applying a normal electric field [17], [18], [19], [20], [21], [22]. In addition to the hybrid structure ...
band structure and exotic phase of matter in bilayer graphene. The approach creates artificially corrugated bilayer graphene in which real-space and momentum-space pseudo-magnetic fields (Berry curvatures) coexist and have non-trivial properties, such as Berry curvature dipoles. This leads to the ...
Extracting the complex optical conductivity of mono- and bilayer graphene by ellipsometry. Appl. Phys. Lett. 2014, 104, 261909. [CrossRef] 21. Wang, B.; Zhang, X.; Garcia-Vidal, F.J.; Yuan, X.C.; Teng, J. Strong coupling of surface plasmon polaritons in monolayer graphene sheet ...