Quasiparticle dynamics in graphene

Bostwick, Aaron; Ohta, Taisuke; Seyller, Thomas; Horn, Karsten; Rotenberg, Eli

doi:10.1038/nphys477

Cited by 1,137 publications

(1,400 citation statements)

References 43 publications

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“…This is a characteristic feature of ARPES on graphene which has been observed in many experiments 53 and that is due to the chiral character of Dirac states at the K point. 54 In this work we do not include any dissipation channel.…”

Section: Fig 3 (B) and (C)mentioning

confidence: 87%

A First-Principles Time-Dependent Density Functional Theory Framework for Spin and Time-Resolved Angular-Resolved Photoelectron Spectroscopy in Periodic Systems

Giovannini

Hübener

Rubio

2016

J. Chem. Theory Comput.

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We present a novel theoretical approach to simulate spin, time and angular-resolved photoelectron spectroscopy (ARPES) from first principles that is applicable to surfaces, thin films, few layer systems, and low-dimensional nanostructures. The method is based on a general formulation in the framework of time-dependent density functional theory (TDDFT) to describe the real timeevolution of electrons escaping from a surface under the effect of any external (arbitrary) laser field. By extending the so called t-SURFF method to periodic systems one can calculate the final photoelectron spectrum by collecting the flux of the ionization current trough an analysing surface. The resulting approach, that we named t-SURFFP, allows to describe a wide range of irradiation conditions without any assumption on the dynamics of the ionization process allowing for pumpprobe simulations on an equal footing. To illustrate the wide scope of applicability of the method we present applications to graphene, mono-and bi-layer WSe2, and hexagonal BN under different laser configurations.

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Section: Fig 3 (B) and (C)mentioning

confidence: 87%

A First-Principles Time-Dependent Density Functional Theory Framework for Spin and Time-Resolved Angular-Resolved Photoelectron Spectroscopy in Periodic Systems

Giovannini

Hübener

Rubio

2016

J. Chem. Theory Comput.

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“…In low dimensional and strongly anisotropic systems correlation effects play a crucial role in understanding and describing the electronic band structure. Kinks in the quasiparticle (QP) dispersions and lifetimes were observed and interpreted as band renormalization due to electron-phonon [5] and electron-plasmon [6] interactions and band-structure effects [7]. Its electronic properties are also very sensitive to stacking and the number of layers [8].…”

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confidence: 99%

Electron-Electron Correlation in Graphite: A Combined Angle-Resolved Photoemission and First-Principles Study

et al. 2008

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The full three-dimensional dispersion of the bands, Fermi velocities, and effective masses are measured with angle-resolved photoemission spectroscopy and compared to first-principles calculations. The band structure by density-functional theory underestimates the slope of the bands and the trigonal warping effect. Including electron-electron correlation on the level of the GW approximation, however, yields remarkable improvement in the vicinity of the Fermi level. This demonstrates the breakdown of the independent electron picture in semimetallic graphite and points toward a pronounced role of electron correlation for the interpretation of transport experiments and double-resonant Raman scattering for a wide range of carbon based materials. Recently graphene has been investigated as a prototype system to address basic questions of quantum mechanics [1-3] (relativistic Dirac fermions) as well as for high speed semimetal field effect transistors in emerging nanoelectronic devices [4]. Many of these results are based on its peculiar electronic properties, i.e., an isotropic and linear dispersion close to the Fermi level (E F ). In low dimensional and strongly anisotropic systems correlation effects play a crucial role in understanding and describing the electronic band structure. Kinks in the quasiparticle (QP) dispersions and lifetimes were observed and interpreted as band renormalization due to electron-phonon [5] and electron-plasmon [6] interactions and band-structure effects [7]. Its electronic properties are also very sensitive to stacking and the number of layers [8]. In bilayer graphene a gap that could be tuned by doping was observed [9]. For few-layer graphene, the parent compound, graphite, is the key to understanding these new phenomena. Interlayer coupling in an AB stacking sequence leads to the formation of electron and hole pockets responsible for the semimetallic character in graphite. The linear dispersion is broken and only if we have an AA stacking the linear dispersion remains. Nevertheless, at the H point of graphite [2] the band dispersion is close to linear and has been interpreted as Dirac-fermion-like. Much less is known about the quantitative description of electron-electron correlations in these graphitic systems. Angle-resolved photoemission (ARPES) studies indicated that local density approximation (LDA) gives a dispersion that is too flat and a scaling has to be applied in order to fit the experimental dispersion of few-layer graphene and graphite. [15] for Raman scattering in graphene and graphite. Furthermore, it is important to know the exact k z dispersion, because it is responsible for the conductivity perpendicular to the graphene layers.In this Letter we report on a combined ARPES and theoretical ab initio QP study of the three-dimensional band structure and the Fermi surface in graphite single crystals. ARPES is best for studying correlations since it probes the complex self-energy function which contains the electronic interactions. We elucidate the full electronic QP disper...

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“…Electrodynamic properties of graphene, which have been studied both experimentally 31,32,33,34 and theoretically 5,15,16,24,28,29,35,36,37,38,39,40,41,42,43,44,45,46,47,48 , also demonstrate non-trivial features in the frequency dependent conductivity 15,24,28,35,48 , photon-assisted transport 36 , microwave and far-infrared response 29,37,38,39,40,41 , plasmons spectrum 42,43,44,45,46 , et cetera. New electromagnetic modes, specific only for the graphene system, have been also predicted 47,48 .…”

Section: Introductionmentioning

confidence: 99%

Nonlinear electromagnetic response of graphene: frequency multiplication and the self-consistent-field effects

Mikhaǐlov

Ziegler²

2008

J. Phys.: Condens. Matter

391

390

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Graphene is a recently discovered carbon based material with unique physical properties. This is a monolayer of graphite, and the two-dimensional electrons and holes in it are described by the effective Dirac equation with a vanishing effective mass. As a consequence, electromagnetic response of graphene is predicted to be strongly non-linear. We develop a quasi-classical kinetic theory of the non-linear electromagnetic response of graphene, taking into account the self-consistent-field effects. Response of the system to both harmonic and pulse excitation is considered. The frequency multiplication effect, resulting from the non-linearity of the electromagnetic response, is studied under realistic experimental conditions. The frequency up-conversion efficiency is analysed as a function of the applied electric field and parameters of the samples. Possible applications of graphene in terahertz electronics are discussed.

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Quasiparticle dynamics in graphene

Cited by 1,137 publications

References 43 publications

A First-Principles Time-Dependent Density Functional Theory Framework for Spin and Time-Resolved Angular-Resolved Photoelectron Spectroscopy in Periodic Systems

A First-Principles Time-Dependent Density Functional Theory Framework for Spin and Time-Resolved Angular-Resolved Photoelectron Spectroscopy in Periodic Systems

Electron-Electron Correlation in Graphite: A Combined Angle-Resolved Photoemission and First-Principles Study

Nonlinear electromagnetic response of graphene: frequency multiplication and the self-consistent-field effects

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