The effect of spin-orbit coupling in band structure and edge states of bilayer graphene

Journal Article · Thu Apr 16 00:00:00 EDT 2015 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4917097· OSTI ID:22391475

Sahdan, Muhammad Fauzi; Darma, Yudi ^[1]

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1. Department of Physics, InstitutTeknologi Bandung, Jalan Ganesa 10, Bandung 40132 (Indonesia)

Topological insulators are predicted to be useful ranging from spintronics to quantum computation. Graphene was first predicted to be the precursor of topological insulator by Kane-Mele. They developed a Hamiltonian model to describe the gap opening in graphene. In this work, we investigate the band structure of bilayer grapheme and also its edge states by using this model with analytical approach. The results of our calculation show that the gap opening occurs at K and K’ point in bilayer graphene.In addition, a pair of gapless edge modes occurs both in the zigzag and arm-chair configurations are no longer exist. There are gap created at the edge even though thery are very small.

• OSTI ID: 22391475
• Journal Information: AIP Conference Proceedings, Vol. 1656, Issue 1; Conference: APS 2012: 5. Asian Physics Symposium, Bandung (Indonesia), 10-12 Jul 2012; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CONFIGURATION
DIELECTRIC MATERIALS
ELECTRONIC STRUCTURE
ENERGY GAP
ENERGY LEVELS
GRAPHENE
HAMILTONIANS
LAYERS
L-S COUPLING
QUANTUM COMPUTERS
TOPOLOGY