Excitonic Effects on the Optical Response of Graphene and Bilayer Graphene

2009/06/30 by Li Yang, Jack Deslippe, Cheol-Hwan Park +2 · 703 citations
Chemistry · Materials Science · Physics and Astronomy · #2D Materials and Applications #Absorbance #Band gap #Bilayer #Bilayer graphene #Chemistry #Condensed matter physics #Electron #Exciton #Graphene #Graphene research and applications #Materials science #Nanotechnology #Optics #Physics #Quantum and electron transport phenomena #Quantum mechanics #Quasiparticle #cond-mat.mtrl-sci

paper · pdf · doi:10.1103/physrevlett.103.186802

published in Physical Review Letters 103(18), 186802 (American Physical Society)

openalex publication_date 2009/10/28 · arxiv created 2009/10/31 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We present first-principles calculations of many-electron effects on the optical response of graphene, bilayer graphene, and graphite employing the GW-Bethe Salpeter equation approach. We find that resonant excitons are formed in these two-dimensional semimetals. The resonant excitons give rise to a prominent peak in the absorption spectrum near 4.5 eV with a different line shape and significantly redshifted peak position from those of an absorption peak arising from interband transitions in an independent quasiparticle picture. In the infrared regime, our calculated optical absorbance per graphene layer is approximately a constant, 2.4%, in agreement with recent experiments; additional low frequency features are found for bilayer graphene because of band structure effects.

Citations

• Ab-initio band structure of doped graphene
• Excitonic Effects and Optical Spectra of Single-Walled Carbon Nanotubes
• Transport of Dirac quasiparticles in graphene: Hall and optical conductivities
• Electron-hole excitations and optical spectra from first principles
• Electric Field Effect in Atomically Thin Carbon Films
• The electronic properties of graphene
• Fine Structure Constant Defines Visual Transparency of Graphene
• Modern quantum mechanics

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