Ionization and Fragmentation of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>C</mml:mi></mml:mrow><mml:mrow><mml:mn>60</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>via Multiphoton-Multiplasmon Excitation

Hunsche, S.; Starczewski, T.; L’Huillier, Anne; Persson, Anders; Wahlström, Claes‐Göran; Heuvell, H. van Linden van den B.; Svanberg, Sune

doi:10.1103/physrevlett.77.1966

Cited by 112 publications

(60 citation statements)

References 18 publications

(41 reference statements)

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“…This collective charge excitation leads to an efficient energy transfer to the vibrational modes of the molecule and to a possible rupture of the cage via two-plasmon excitation. 53 In our case, the role of the external electromagnetic field is played by the intense dipole moment created by the impact on the metallic surface of Si. Due to the short duration of the impact, electrons cannot instantaneously follow the nuclear positions, and therefore "lag behind" the nuclei during the collision.…”

Section: Non-adiabatic Molecular Dynamicsmentioning

confidence: 95%

Non-adiabatic ab initio molecular dynamics of supersonic beam epitaxy of silicon carbide at room temperature

Taioli

Garberoglio

Simonucci

et al. 2013

The Journal of Chemical Physics

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In this work, we investigate the processes leading to the room-temperature growth of silicon carbide thin films by supersonic molecular beam epitaxy technique. We present experimental data showing that the collision of fullerene on a silicon surface induces strong chemical-physical perturbations and, for sufficient velocity, disruption of molecular bonds, and cage breaking with formation of nanostructures with different stoichiometric character. We show that in these out-ofequilibrium conditions, it is necessary to go beyond the standard implementations of density functional theory, as ab initio methods based on the Born-Oppenheimer approximation fail to capture the excited-state dynamics. In particular, we analyse the Si-C 60 collision within the non-adiabatic nuclear dynamics framework, where stochastic hops occur between adiabatic surfaces calculated with time-dependent density functional theory. This theoretical description of the C 60 impact on the Si surface is in good agreement with our experimental findings.

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Section: Non-adiabatic Molecular Dynamicsmentioning

confidence: 95%

Non-adiabatic ab initio molecular dynamics of supersonic beam epitaxy of silicon carbide at room temperature

Taioli

Garberoglio

Simonucci

et al. 2013

The Journal of Chemical Physics

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“…The influence of the GDPR on electron capture by fast highly charged ions from a free fullerene molecule has been studied using an x-ray technique [25]. The effect of this resonance on the ionization and fragmentation of C 60 in collisions with photons and heavy ions was also reported earlier [6,[26][27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 91%

“…For example, the collective oscillations of these delocalized σ and π valence electrons in C 60 fullerene give rise to a Mie-type surface plasmon resonance [3], which is also known as giant dipole plasmon resonance * lokesh@tifr.res.in (GDPR). This GDPR in fullerenes [4][5][6][7][8][9][10][11][12][13][14] is, to some extent, analogous to the well-known nuclear giant dipole resonance [15], plasmon excitation in solids and metallic clusters [16], as well as shape resonances in large atoms (e.g., Xe) [17]. This collective behavior of electrons in solids is known to give rise to dynamic screening and a wake of electron-density fluctuations [18,19].…”

Section: Introductionmentioning

confidence: 99%

Angle-differential observation of plasmon electrons in the double-differential cross-section spectra of fast-ion-induced electron ejection fromC60

2015

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We report on the measurement of double-differential distribution of soft electron emission from C 60 fullerene, induced by a fast-moving Coulomb field of 76 MeV energy bare fluorine ions. A broad "plasmon-electron" peak, riding on the Coulomb-ionization continuum, is observed due to the deexcitation of the giant dipole plasmon resonance state in C 60 . The angular distribution of the plasmon electrons goes through a dip around 90• , which is contrary to that observed in ion-atom collisions measured in situ, indicating the alignment of the induced dipole moment along the projectile beam direction. A model based on the photoelectron angular distribution which is modified due to the ion-induced postcollisional interaction provides an excellent agreement with the observed asymmetric distribution. The distribution smoothly changes from a dip at 90• to a peak with the variation of ejected electron energy indicating transition from a collective plasmon behavior of the whole system to a single ion-atom interaction. The single-differential cross section was also derived, which preserves the signature of the collective excitation.

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“…The 14.4-keV MoK ssbauer gamma radiation bringing with it information about the environment is emitted with &10\ s delay after the electron-capture decay and therefore is oblivious of the Auger event. The formation of a plasmon by excitation of delocalized electrons and its decay by ejection of an electron has been recently veri"ed by photoemission studies of C and C (14,15).…”

Section: Introductionmentioning

confidence: 98%