Band structure asymmetry of bilayer graphene revealed by infrared spectroscopy

Abstract

We report on infrared spectroscopy of bilayer graphene integrated in gated structures. We observed a significant asymmetry in the optical conductivity upon electrostatic doping of electrons and holes. We show that this finding arises from a marked asymmetry between the valence and conduction bands, which is mainly due to the inequivalence of the two sublattices within the graphene layer. From the conductivity data, the energy difference of the two sublattices is determined.

arXiv comment4 pages, 3 figures

References in corpus (18)

• Two-Dimensional Gas of Massless Dirac Fermions in Graphene
• Experimental Observation of Quantum Hall Effect and Berry's Phase in Graphene
• Universal Dynamic Conductivity and Quantized Visible Opacity of Suspended Graphene
• Landau level degeneracy and quantum Hall effect in a graphite bilayer
• Biased bilayer graphene: semiconductor with a gap tunable by electric field effect
• Unconventional quantum Hall effect and Berry's phase of 2pi in bilayer graphene
• Asymmetry gap in the electronic band structure of bilayer graphene
• Electronic states and Landau levels in graphene stacks
• Optical and magneto-optical far-infrared properties of bilayer graphene
• Probing the Electronic Structure of Bilayer Graphene by Raman Scattering
• Electronic properties of bilayer and multilayer graphene
• Determination of the electronic structure of bilayer graphene from infrared spectroscopy results
• Electronic properties of graphene multilayers
• Electron-electron interactions and the phase diagram of a graphene bilayer
• Cyclotron resonance in bilayer graphene
• Optical conductivity of bilayer graphene with and without an asymmetry gap
• Observation of Anomalous Phonon Softening in Bilayer Graphene
• Transmission through a biased graphene bilayer barrier

Cited by in corpus (84)

• Electron-Electron Interactions in Graphene: Current Status and Perspectives
• Observation of an Electric-Field Induced Band Gap in Bilayer Graphene by Infrared Spectroscopy
• Observation of an electrically tunable band gap in trilayer graphene
• Correlated states in twisted double bilayer graphene
• Optical Absorption in Twisted Bilayer Graphene
• Commensuration and Interlayer Coherence in Twisted Bilayer Graphene
• Graphene mode locked, wavelength-tunable, dissipative soliton fiber laser
• Electronic properties of graphene-based bilayer systems
• Determination of the gate-tunable bandgap and tight-binding parameters in bilayer graphene using infrared spectroscopy
• Correlated Insulating States in Twisted Double Bilayer Graphene
• Trigonal warping and Berry's phase N pi in ABC-stacked multilayer graphene
• Topologically Protected Helical States in Minimally Twisted Bilayer Graphene
• Interlayer screening effect in graphene multilayers with ABA and ABC stacking
• Strain-induced Evolution of Electronic Band Structures in a Twisted Graphene Bilayer
• Stacking Order dependent Electric Field tuning of the Band Gap in Graphene Multilayers
• Quantum dots and spin qubits in graphene
• Chemical Potential and Quantum Hall Ferromagnetism in Bilayer Graphene
• Gate tunable charged-phonon effect in bilayer graphene
• Electronic properties of a biased graphene bilayer
• Landau level spectra and the quantum Hall effect of multilayer graphene
• Gate-dependent Pseudospin Mixing in Graphene/Boron Nitride Moire Superlattices
• Tunneling Plasmonics in Bilayer Graphene
• Thermopower of gapped bilayer graphene
• Mapping the Dirac point in gated bilayer graphene
• Novel mid-infrared plasmonic properties of bilayer graphene
• Quantum Hall Effect and Semimetallic Behavior of Dual-Gated ABA-Stacked Trilayer Graphene
• Anisotropic AC conductivity of strained graphene
• Magneto-optical conductivity in graphene including electron-phonon coupling
• Electronic properties of monolayer and bilayer graphene
• Electron Transport Properties of Bilayer Graphene
• Infrared and Terahertz Spectroscopy of Strongly Correlated Electron Systems under Extreme Conditions
• Observation of the Kohn anomaly near the K point of bilayer graphene
• Experimental Observation of Surface States and Landau Levels Bending in Bilayer Graphene
• Spectral features due to inter-Landau-level transitions in the Raman spectrum of bilayer graphene
• Influence of interlayer asymmetry on magneto-spectroscopy of bilayer graphene
• Nonlinear optical response of doped mono- and bilayer graphene: length gauge tight-binding model
• Superluminal plasmons with resonant gain in population inverted bilayer graphene
• Ground state of graphene heterostructures in the presence of random charged impurities
• Theory of low power ultra-broadband terahertz sideband generation in bi-layer graphene
• Landau Quantization in Twisted Bilayer Graphenes: the Dirac Comb
• Characterizing top gated bilayer graphene interaction with its environment by Raman spectroscopy
• Renormalization and cyclotron resonance in bilayer graphene with weak electron-hole asymmetry
• Effects of electron-phonon coupling on Landau levels in graphene
• Effect of next-nearest neighbor coupling on the optical spectra in bilayer graphene
• Band gap engineering in AA-stacked bilayer graphene
• Ultrapure Multilayer Graphene in Bromine Intercalated Graphite
• Enhanced Optical Dichroism of Graphene Nanoribbons
• External gates and transport in biased bilayer graphene
• Screening in gated bilayer graphene
• Magneto-optics of monolayer and bilayer graphene
• Screening in gated bilayer graphene via variational calculus
• Cyclotron resonance of the magnetic ratchet effect and second harmonic generation in bilayer graphene
• Band Structure and Optical Absorption in Multilayer Armchair Graphene Nanoribbons: A Pariser-Parr-Pople Model Study
• Electron collimation at van der Waals domain walls in bilayer graphene
• Terahertz photoconductivity in bilayer graphene transistors: evidence for tunneling at gate-induced junctions
• Fast and slow edges in bilayer graphene nanoribbons: Tuning the transition from band- to Mott-insulator
• Optical Properties of Monolayer Bismuthene in Electric Fields
• Transport Properties in Gapped Bilayer Graphene
• Measurement of graphite tight-binding parameters using high field magneto-reflectance
• Gate-tunable bandgap in bilayer graphene
• Theory of inter-Landau level magnetoexcitons in bilayer graphene
• Electric-field induced penetration of edge states at the interface between monolayer and bilayer graphene
• Coulomb interaction and electron-hole asymmetry in cyclotron resonance of bilayer graphene in high magnetic field
• Third harmonic generation in gapped bilayer graphene
• dmu/dn In suspended bilayer graphene: the interplay of disorder and band gap
• Comparison of microscopic models for disorder in bilayer graphene: Implications for the density of states and the optical conductivity
• Quantum magneto-optics of graphite family
• Raman Scattering as a Selective Probe of Chiral Electronic Excitations in Bilayer Graphene
• Effect of Dynamical Screening on Single Particle Spectral Features of Uniaxially Strained Graphene: Tuning the Plasmaron Ring
• AC transport properties of single and bilayer graphene
• Universal infrared conductivity of graphite
• Low energy band structure in Bernal stacked hexlayer graphene: Landau fan diagram and resistance ridge
• Confined states in graphene quantum blisters
• Trigonal warping, pseudodiffusive transport, and finite-system version of the Lifshitz transition in magnetoconductance of bilayer-graphene Corbino disks
• Anisotropy of graphite optical conductivity
• Theory of interaction-induced renormalization of Drude weight and plasmon frequency in chiral multilayer graphene
• Electric Field Effects on the Optical Vibrations in AB-Stacked Bilayer Graphene
• Optical Properties of Graphene in Magnetic and Electric fields
• High energy shift in the optical conductivity spectrum of the bilayer graphene
• Effect of asymmetric Fermi velocity on trigonally warped spectrum of bilayer graphene
• Multiband ballistic transport and anisotropic commensurability magnetoresistance in antidot lattices of AB-stacked trilayer graphene
• Spatial variation of energy gap and Landau levels around gapped bilayer graphene domain walls
• On the plasmon dispersion in biased graphene bilayer
• The infrared spectra of ABC-stacking tri- and tetra-layer graphenes studied by first-principles calculations