Electronic band gaps and transport properties in periodically alternating mono- and bi-layer graphene superlattices

Abstract

We investigate the electronic band structure and transport properties of periodically alternating mono- and bi-layer graphene superlattices (MBLG SLs). In such MBLG SLs, there exists a zero-averaged wave vector (zero-$\overline{k}$) gap that is insensitive to the lattice constant. This zero-$\overline{k}$ gap can be controlled by changing both the ratio of the potential widths and the interlayer coupling coefficient of the bilayer graphene. We also show that there exist extra Dirac points; the conditions for these extra Dirac points are presented analytically. Lastly, we demonstrate that the electronic transport properties and the energy gap of the first two bands in MBLG SLs are tunable through adjustment of the interlayer coupling and the width ratio of the periodic mono- and bi-layer graphene.

More discussion is added and the English is polished. Accepted for publication in EPL

References in corpus (18)

• Electric Field Effect in Atomically Thin Carbon Films
• The electronic properties of graphene
• Chiral tunneling and the Klein paradox in graphene
• Electronic States of Graphene Nanoribbons
• Asymmetry gap in the electronic band structure of bilayer graphene
• Temperature dependent transport in suspended graphene
• Colloquium: The transport properties of graphene: An introduction
• Quantum-limited shot noise in graphene
• Edge States and the Quantized Hall Effect in Graphene
• Ballistic transmission through a graphene bilayer
• Transmission through a biased graphene bilayer barrier
• Bilayer graphene with single and multiple electrostatic barriers: band structure and transmission
• Transmission through a boundary between monolayer and bilayer graphene
• Magnetic Impurities in Graphene
• Strain induced edge magnetism at zigzag edge in graphene quantum dot
• Wess-Zumino-Witten Terms in Graphene Landau Levels
• Electronic band gaps and transport properties in aperiodic bilayer graphene superlattices of Thue-Morse sequence
• Graphene on graphene antidot lattices: Electronic and transport properties