Plasmons and optical properties of carbon nanotubes

Lin, Mingyao; Shung, Kenneth W. K.

doi:10.1103/physrevb.50.17744

Cited by 244 publications

(167 citation statements)

References 20 publications

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“…The two components are estimated from graphite parameter, in particular we follow ref. [21] and we put the value q± = 2.4 and for ell we use a value 100 times greater [21]. With a = 1 and b = 0, i.e.…”

Section: Resultsmentioning

confidence: 99%

Self-Energy corrections to DFT-LDA Gaps of Realistic Carbon Nanotubes

2001

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Since their discovery carbon nanotubes have attracted much interest for their peculiar electronic properties which go from metallic to semiconducting behaviour, depending both on diameter and chirality. The exact value of their band gap is obviously a crucial point to be addressed because it enters in the nanotube application as microelectronic devices. By making use of an efficient GW scheme, previously tested on bulk systems, as well as of a model screening function, we obtaind for the first time excitation energies and band-gap values for carbon nanotubes. Results for (6, 0) and (7, 0) will be presented and discussed.

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Section: Resultsmentioning

confidence: 99%

Self-Energy corrections to DFT-LDA Gaps of Realistic Carbon Nanotubes

2001

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“…1-4 has covered fundamental aspects such as nonlocality 5 , quantum effects in nanoscale structures including fullerene [6][7][8] , graphene 9,10 , carbon nanotubes 11,12 , silicene 13,14 and metallic dimers 15 , surface plasmon lasing 16 , plasmon-electron interaction 17 and the potential role played by plasmon excitations in electronic sensors 18,19 and radiation degradation of electronic and optoelectronic devices 20 . The surge in activity to understand and discover novel plasmonic materials is stimulated by possible applications such as light concentration for solar energy 21 , devices for telecommunications 22 , and near-field instrumentation 23 .…”

Section: Recent Research On Plasmon Excitationsmentioning

confidence: 99%

Nonlocal plasma spectrum of graphene interacting with a thick conductor

2015

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Self-consistent field theory is used to obtain the non-local plasmon dispersion relation of monolayer graphene which is Coulomb-coupled to a thick conductor. We calculate numerically the undamped plasmon excitation spectrum for arbitrary wave number. For gapped graphene, both the lowfrequency (acoustic) and high frequency (surface) plasmons may lie within an undamped opening in the particle-hole region. Furthermore, we obtain plasmon excitations in a region of frequency-wave vector space which do not exist for free-standing gapped graphene.

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“…In particular, electron energy-loss spectroscopy ͑EELS͒ has been recently employed to analyze the dielectric response of isolated carbon nanotubes 2,8 as well as of bulk polycrystalline samples of nanotubes. [9][10][11][12] By theoretical means, the existing research on the dielectric response of carbon nanotubes falls under three categories: ͑a͒ Model calculations 13 based on an electron-gas treatment of the response; ͑b͒ tight-binding calculations 14 based on a -electron Hamiltonian. These calculations were done for a large variety of chiral and nonchiral nanotubes of various diameters and helped to elucidate aspects of the response in a frequency range up to 15 eV, where → Ã excitations dominate.…”

Section: Introductionmentioning

confidence: 99%

Ab initiostudy of the dielectric response of crystalline ropes of metallic single-walled carbon nanotubes: Tube-diameter and helicity effects

2008

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The dielectric-response functions of crystalline ropes of metallic single-walled carbon nanotubes were determined from time-dependent density-functional theory in the random-phase approximation. Interband transitions and plasmonic excitations were studied as a function of momentum transfer. The impact of the tube diameter was shown for the ͑n , n͒ armchair-type series ͑n ranging from 3 to 8͒ covering a diameter range from 4 to 11 Å. Helicity effects were examined for the thinnest tubes, the armchair ͑3,3͒ versus the zigzag ͑5,0͒ configurations. Our results give detailed insight into the various kinds of excitations that can be observed in ropes of nanotubes. Recent experimental findings and trends by electron energy loss and Raman spectroscopies are reproduced and explained.

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Plasmons and optical properties of carbon nanotubes

Cited by 244 publications

References 20 publications

Self-Energy corrections to DFT-LDA Gaps of Realistic Carbon Nanotubes

Self-Energy corrections to DFT-LDA Gaps of Realistic Carbon Nanotubes

Nonlocal plasma spectrum of graphene interacting with a thick conductor

Ab initiostudy of the dielectric response of crystalline ropes of metallic single-walled carbon nanotubes: Tube-diameter and helicity effects

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