Many-electron effects on optical absorption spectra of strained graphene

@article{Liang2012ManyelectronEO,
  title={Many-electron effects on optical absorption spectra of strained graphene},
  author={Yufeng Liang and Shouting Huang and Li Yang},
  journal={Journal of Materials Research},
  year={2012},
  volume={27},
  pages={403-409}
}
We use the first-principles GW + Bethe–Salpeter equation approach to study the electronic structure and optical absorption spectra of uniaxial strained graphene. Applied strain induces an anisotropic Fermi velocity and tilts the axis of the Dirac cone. As a result, the optical response of strained graphene is dramatically changed; the optical absorption is anisotropic; the characteristic single optical absorption peak of pristine graphene is split into two peaks with enhanced excitonic effects… 
8 Citations
Many‐body effects in optical response of graphene‐based structures
Graphene is an exciting material for optoelectronics and plasmonics. Its optical response may be changed under mechanical action, such as stretching or corrugation, and with confinement of a size in
Tuning optical conductivity of large-scale CVD graphene by strain engineering.
TLDR
The strain sensitivity of the optical response of graphene demonstrated here can be effectively utilized towards novel ultra-thin optical devices and strain sensing applications.
Transformation optics scheme for two-dimensional materials.
TLDR
This Letter uses a scheme for transforming surface currents to highlight that the surface conductivity transforms in a way different from ϵ and μ, to demonstrate an example problem of reducing the scattering of the plasmon mode from sharp protrusions in graphene.
The GW Compendium: A Practical Guide to Theoretical Photoemission Spectroscopy
TLDR
This review is intended for newcomers to GW calculations but can also serve as an alternative perspective for experts and an up-to-date source of computational techniques.
Spin transition properties of metal (Zn, Mn) diluted Fe(phen)2(NCS)2 spin-crossover thin films
We report here the effect of metal (Zn and Mn) dilution on the spin transition of Fe(phen)2 (NCS)2 thin film spin-crossover (SCO) complex. The SCO complexes are deposited on glass and
Graphene-induced confined crystal growth of octahedral Zn 2 SnO 4 and its improved Li-storage properties
A Zn2SnO4/graphene (Zn2SnO4/G) hybrid was prepared by a facile one-pot hydrothermal route using SnCl4·5H2O, ZnSO4·7H2O, and graphite oxide as the precursors and NaOH as the mineralizer. Microsized
Facile synthesis of CoSnO3/Graphene nanohybrid with superior lithium storage capability
Abstract CoSnO 3 /G nanohybrid has been synthesized by thermal annealing of CoSn(OH) 6 /G, prepared by a facile in situ solvothermal route using CoSO 4 , K 2 SnO 3 and GO as precursors and has been

References

SHOWING 1-10 OF 31 REFERENCES
Excitonic effects on optical absorption spectra of doped graphene.
  • L. Yang
  • Materials Science, Physics
    Nano letters
  • 2011
TLDR
First-principles calculations to study optical absorption spectra of doped graphene with many-electron effects included show a combining effect from the band filling and electron-hole interactions results in such an enhanced excitonic effect on the optical absorption.
Excitonic effects on the optical response of graphene and bilayer graphene.
TLDR
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.
Seeing many-body effects in single- and few-layer graphene: observation of two-dimensional saddle-point excitons.
TLDR
The experiment showed a weak dependence of the excitonic resonance in few-layer graphene on layer thickness, which reflects the effective cancellation of the increasingly screened repulsive electron-electron (e-e) and attractive electron-hole ( e-h) interactions.
Spectroscopic ellipsometry of graphene and an exciton-shifted van Hove peak in absorption
We demonstrate that optical transparency of any two-dimensional system with a symmetric electronic spectrum is governed by the fine structure constant and suggest a simple formula that relates a
Optical properties of strained graphene
The optical conductivity of graphene strained uniaxially is studied within the Kubo-Greenwood formalism. Focusing on inter-band absorption, we analyze and quantify the breakdown of universal
Strain effect on the optical conductivity of graphene
Within the tight-binding approximation, we study the dependence of the electronic band structure and of the optical conductivity of a graphene single layer on the modulus and direction of applied
Excitons in intrinsic and bilayer graphene
Through first-principles calculations with many-body effects included, we have revealed unique excitonic effects in the high-frequency regime ($10~20$ eV) of optical spectra of graphene and bilayer
Effects of strain on electronic properties of graphene
We present first-principles calculations of electronic properties of graphene under uniaxial and isotropic strains, respectively. The semimetallic nature is shown to persist up to a very large
Ab initio high-energy excitonic effects in graphite and graphene
We present ab initio many-body calculations of the optical absorption in bulk graphite, graphene and bilayer of graphene. Electron-hole interaction is included solving the Bethe-Salpeter equation on
The electronic properties of graphene
This article reviews the basic theoretical aspects of graphene, a one-atom-thick allotrope of carbon, with unusual two-dimensional Dirac-like electronic excitations. The Dirac electrons can be
...
1
2
3
4
...