1<i>s</i>x-ray-absorption spectroscopy of<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>: The effects of screening and core-hole relaxation

Wästberg, Bo; Lunell, Sten; Enkvist, Christer; Brühwiler, Paul A.; Maxwell, Andrew J.; Mårtensson, Nils

doi:10.1103/physrevb.50.13031

Cited by 43 publications

(35 citation statements)

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“…The spectrum consists, besides the single narrow C(1s) main line (Lichtenberger et al, 1991, pp.203-208), of a variety of satellite lines and higher lying plasmon excitation (Weaver et al, 1991(Weaver et al, , pp.1741(Weaver et al, -1744, (Benning et al, 1992, pp.6899-6913), (Terminello et al, 1991, pp.491-496). The low binding energy side of the C1s (from 1.9 eV to 9.3 eV) is characterized by different dipole and monopole shake-up satellites, except the one at the 6.0 eV which relates to the π plasmon.…”

Section: Resultsmentioning

confidence: 99%

Strong enhancement of double auger decay following plasmon excitation in C60

Lj.¹,

Axel²,

Uwe³

2018

Vojnotehnički glasnik

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Section: Resultsmentioning

confidence: 99%

Strong enhancement of double auger decay following plasmon excitation in C60

Lj.¹,

Axel²,

Uwe³

2018

Vojnotehnički glasnik

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“…Recall that the spectrum of solid C 60 is quite similar to that of molecular C 60 , with an intensity distribution related to the empty density of states, but strongly modified by core hole effects. [25][26][27] The absorption spectrum of K 3 C 60 shows similar resonances that are, however, somewhat broader than the corresponding excitation in C 60 , and the absorption edge is slightly shifted to lower energies. It is generally accepted that the reduced intensity in the LUMO-derived resonance of K 3 C 60 is approximately proportional to the number of states FIG.…”

Section: A C 1s Excitationsmentioning

confidence: 88%

“…[34][35][36] This is in sharp contrast to the LUMO+ 1 state which, in spite of a shake-up probability comparable to that of the LUMO, 37 does not give rise to any measurable recombination intensity in the XES spectrum. While we cannot explain this, we suggest that there are at least two factors to be considered in explaining this observation: ͑1͒ Using XAS as a guide, the LUMO-derived state has a cross section which is higher by approximately at least a factor of 2, and likely much higher, given the effects of vibronic broadening and the predicted electronic cross sections 25 ; ͑2͒ the proclivity of electrons excited to the LUMO+ 1 to hop to a nearest-neighbor molecule before the core transition 34,36 could be important in this respect.…”

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Bulk electronic structure ofK3C60as revealed by soft x-rays

et al. 2007

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Bulk electronic structure of K3C60 as revealed by soft x-rays Käämbre, Tanel; Schiessling, Joachim; Kjeldgaard, Lisbeth; Qian, Limin; Marenne, Ingrid; O'Shea, James N.; Schnadt, Joachim; Nordlund, Dennis; Glover, Chris J.; Rubensson, JanErik Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.Downloaded from the University of Groningen/UMCG research database (Pure): http://www.rug.nl/research/portal. For technical reasons the number of authors shown on this cover page is limited to 10 maximum. We present C 1s x-ray absorption, x-ray emission, and resonant inelastic x-ray scattering ͑RIXS͒ spectra of single-phase crystalline K 3 C 60 . The comparison to valence-band photoelectron spectra from the same sample facilitates identification of the contribution from surface and bulk electronic states in the latter. Bulk-sensitive techniques show that the valence bands of K 3 C 60 and pure C 60 are characterized by spectral features of similar width, in agreement with the predictions of band-structure calculations. Symmetry selectivity in the RIXS process allows us to assign peaks in the C 1s absorption spectrum, demonstrating a close correspondence with pure C 60 also in the conduction band. The symmetry selectivity is as pronounced in K 3 C 60 as in pure C 60 , indicating that the local C 60 symmetry is not appreciably affected by the K doping, either in the ground state or intermediate state, on the time scale of 6 fs.

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“…In the core-excited state, the threefold degeneracy of the LUMO is lifted by the presence of the core-hole, such that the 5t 1u level ͑in icosahedral, I h , symmetry͒ splits into three levels with slightly different energy eigenvalues. However, as has been shown by theoretical modeling, 16 only one of these states contributes significantly to the C K-edge spectrum due to the large difference in oscillator strengths. Essentially the same holds for the LUMO+ 1 and LUMO+ 2 orbitals, which give rise to peaks at 285.80 eV and 286.35 eV photon energy, respectively.…”

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Hybridization-induced oscillatory magnetic polarization of C60 orbitals at the C60/Fe(001) interface

Tran¹,

Wong²,

Jong³

et al. 2011

Applied Physics Letters

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We have studied the electronic and magnetic properties of the interface between C60 molecules and a Fe(001) surface. X-ray absorption spectroscopy and x-ray magnetic circular dichroism studies of C60 monolayers on Fe(001) surfaces show that hybridization between the frontier orbitals of C60 and continuum states of Fe leads to a significant magnetic polarization of C60 π∗-derived orbitals. The magnitude and also the sign of this polarization were found to depend markedly on the excitation energy. These observations underline the importance of tailoring the interfacial spin polarization at the Fermi level of ferromagnet/organic semiconductor interfaces for applications in organic spintronics.

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1sx-ray-absorption spectroscopy ofC60: The effects of screening and core-hole relaxation

Cited by 43 publications

References 27 publications

Strong enhancement of double auger decay following plasmon excitation in C60

Strong enhancement of double auger decay following plasmon excitation in C60

Bulk electronic structure ofK3C60as revealed by soft x-rays

Hybridization-induced oscillatory magnetic polarization of C60 orbitals at the C60/Fe(001) interface

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