Giant plasmon excitation in free<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">C</mml:mi></mml:mrow><mml:mrow><mml:mn>60</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">C</mml:mi></mml:mrow><mml:mrow><mml:mn>70</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>molecules studied by p

Hertel, I. V.; Steger, H.; Vries, J. de; Weisser, B.; Menzel, Christoph; Kamke, B.; Kamke, W.

doi:10.1103/physrevlett.68.784

Cited by 389 publications

(251 citation statements)

References 12 publications

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“…The experimental studies of fullerene interaction with electromagnetic radiation are evidence of a high degree of collectivization of the 2s 2 and 2p 2 electrons of the carbon atoms forming a fullerene. This manifest itself, first of all, in existing the Giant Resonance in the cross section of the C 60 fullerene photoabsorption that was discovered and then investigated in a number of experimental studies [2,3]. Virtual excitation of these electrons significantly influences the radiative and Auger -decay processes taking place in so-called endohedral atoms A@C 60 , i.e.…”

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confidence: 99%

“…[8], can be calculated from the experimental data on the photoabsorbtion of this molecule [2,3]. Such an approach, unlike the method in Ref.…”

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confidence: 99%

“…The calculation of the integral (4) with the experimental data for ) (ω σ performed in Refs. [2,3] shows that the total number of electrons eff N that take part in forming of the Giant Resonance in photoionization cross section is equal to 250 ≈ eff N . This value differs only by ~ 4% from the number of collectivized 2s 2 and 2p 2 electrons of the 60 carbon atoms, each giving 4 electrons forming a system of 240 collectivized electrons.…”

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On the possibility of considering the fullerene shell C60 as a conducting sphere

Amusia

Baltenkov²

2006

Physics Letters A

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Correctness of the model representing the fullerene shell C 60 as a conducting sphere has been analyzed. The static and dynamical polarizabilities of the molecule C 60 have been calculated on the basis of experimental data on the photoabsorption crosssection of fullerene. It has been shown that the real C 60 in the static electric field behaves most likely as a set of separate carbon atoms rather than as a conducting sphere and its static polarizability exceeds by more than two times that of conducting sphere.

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confidence: 99%

“…[8], can be calculated from the experimental data on the photoabsorbtion of this molecule [2,3]. Such an approach, unlike the method in Ref.…”

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confidence: 99%

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On the possibility of considering the fullerene shell C60 as a conducting sphere

Amusia

Baltenkov²

2006

Physics Letters A

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“…The energy difference between E A and E I (the conductivity gap) is reduced by a factor of 2 when comparing the energy levels of an isolated molecule with those of a C 60 monolayer on Ag (111). Values taken from [13,21,[34][35][36][37][38][39] In the system depicted by Fig. 1c, the metal stabilizes the charged state of the C 60 -ion, since the metal effectively screens the ion.…”

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confidence: 99%

On interface dipole layers between C 60 and Ag or Au

Veenstra

Heeres

Hadziioannou

et al. 2002

Applied Physics A: Materials Science & Processing

105

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C 60 layers on polycrystalline Ag and Au are studied by photoelectron spectroscopy. At these metal/C 60 interfaces an electron transfer occurs from the metal to the lowest unoccupied orbital of C 60 . We found in the case of the polycrystalline Ag/C 60 interface a dipolar layer with its associated electric field in the direction corresponding to the charge transfer, so pointing from the substrate to the adsorbent. Yet, at the Au/C 60 interface we observed an overall electric field pointing from C 60 towards the metal. We discuss our observations in terms of charge transfer, screening and hybridization effects and propose the occurrence of a hybridization mechanism similar to back-bonding at the Au/C 60 interface. We show that the alignment of energy levels at the metal/C 60 interface cannot simply be deduced using the metal workfunction and the frontier orbitals of C 60 , including screening effects, since hybridization effects may strongly alter the interfacial energy level structure. Our experimental findings on the polycrystalline metal/C 60 interfaces indicate an at-most weak dependence of the Fermi level of the C 60 overlayer on the workfunction of the polycrystalline metal substrate. These interfaces are found in donoracceptor-based organic photovoltaic devices and our results may help to understand the electrical characteristics of these devices.

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“…Existence of a giant resonance in the excitation spectra of fullerenes at about 20 eV was predicted theoretically [12] and then observed experimentally in the case of C 60 in photoionization [13] and inelastic scattering of electrons [14]. Recent experiments on photoionization of neutral [15] and charged [16] C 60 molecules revealed the existence of the second collective resonance at about 40 eV which firstly was assigned to the volume plasmon [16].…”

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Interplay of the volume and surface plasmons in the electron energy loss spectra of C₆₀

Verkhovtsev

Korol

Solov’yov

et al. 2012

J. Phys. B: At. Mol. Opt. Phys.

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Abstract. The results of a joint experimental and theoretical investigation of the C 60 collective excitations in the process of inelastic scattering of electrons are presented. The shape of the electron energy loss spectrum is observed to vary when the scattering angle increases. This variation arising due to the electron diffraction of the fullerene shell is described by a new theoretical model which treats the fullerene as a spherical shell of a finite width and accounts for the two modes of the surface plasmon and for the volume plasmon as well. It is shown that at small angles the inelastic scattering cross section is determined mostly by the symmetric mode of the surface plasmon, while at larger angles the contributions of the antisymmetric surface plasmon and the volume plasmon become prominent.

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Giant plasmon excitation in freeC60andC70molecules studied by p

Cited by 389 publications

References 12 publications

On the possibility of considering the fullerene shell C60 as a conducting sphere

On the possibility of considering the fullerene shell C60 as a conducting sphere

On interface dipole layers between C 60 and Ag or Au

Interplay of the volume and surface plasmons in the electron energy loss spectra of C₆₀

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Giant plasmon excitation in freeC60andC70molecules studied by p

Cited by 389 publications

References 12 publications

On the possibility of considering the fullerene shell C60 as a conducting sphere

On the possibility of considering the fullerene shell C60 as a conducting sphere

On interface dipole layers between C 60 and Ag or Au

Interplay of the volume and surface plasmons in the electron energy loss spectra of C60

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Product

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Interplay of the volume and surface plasmons in the electron energy loss spectra of C₆₀