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Resonant Soft X-ray Spectroscopic Studies of C60 and Related Materials
Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics.
2002 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis addresses the electronic structure of molecular and correlated solids using resonant inelastic soft X-ray scattering (RIXS), non-resonant X-ray emission, photoemissionand X-ray absorption spectroscopies. The use of monochromatised synchrotron radiation and improved energy resolution for X-ray emission have made it possible to elucidate the normal state transport properties and to get further insight into the electron-vibration coupling in fullerenes and the related compounds. The latter is particularly important in order to understand the physical mechanism of superconductivity in fullerene materials. The characteristic intermolecular charge transfer times in K3C60 are found to be longer than the X-ray scattering time-scale (a few femtoseconds). The slow intermolecular charge transport emphasizes that the reduced fullerene compounds can not be treated as simple metals, but rather as systems with strong electron correlation. The electron structure and the bonding character of the more covalent transition metal (V, Ti, Nb) fullerides have been addressed. Evidence indicating the existence of chemical bond between the metal atom(s) and C60 is presented, and the nature of the bond is discussed by comparing RIXS spectroscopic measurements and theoretical predictions. The (crystal) momentum conservation is discussed by comparing the spectroscopic data of a quasi-1D (carbon nanotubes) and quasi-2D (graphite) systems. Finally, the intra-atomic electron-electron correlation is discussed in the case of double core-hole state photo-excitation and de-excitation processes. RIXS including intermediate states with two core vacancies has been observed for the first time in the soft X-ray region.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis , 2002. , p. 54
Series
Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1104-232X ; 684
Keywords [en]
Physics
Keywords [sv]
Fysik
National Category
Physical Sciences
Research subject
Physics
Identifiers
URN: urn:nbn:se:uu:diva-1634ISBN: 91-554-5222-1 (print)OAI: oai:DiVA.org:uu-1634DiVA, id: diva2:161242
Public defence
2002-02-08, The Siegbahn Hall, Ångström Laboratory, Uppsala, 13:15
Opponent
Available from: 2002-01-18 Created: 2002-01-18Bibliographically approved
List of papers
1. Resonant Inelastic X-ray Scattering Study of Intermolecular Charge Transfer Rates in K3C60
Open this publication in new window or tab >>Resonant Inelastic X-ray Scattering Study of Intermolecular Charge Transfer Rates in K3C60
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Manuscript (Other academic)
Identifiers
urn:nbn:se:uu:diva-89596 (URN)
Available from: 2002-01-18 Created: 2002-01-18 Last updated: 2010-01-13Bibliographically approved
2. Surface Electronic Structure of K3C60
Open this publication in new window or tab >>Surface Electronic Structure of K3C60
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In: Phys. Rev. Lett.Article in journal (Refereed) Submitted
Identifiers
urn:nbn:se:uu:diva-89597 (URN)
Available from: 2002-01-18 Created: 2002-01-18Bibliographically approved
3. Resonant inelastic X-ray scattering from solid C60
Open this publication in new window or tab >>Resonant inelastic X-ray scattering from solid C60
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Manuscript (Other academic)
Identifiers
urn:nbn:se:uu:diva-89598 (URN)
Available from: 2002-01-18 Created: 2002-01-18 Last updated: 2010-01-13Bibliographically approved
4. Local Dephasing and Vibronic Character of Electron States in Solid C60
Open this publication in new window or tab >>Local Dephasing and Vibronic Character of Electron States in Solid C60
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Manuscript (Other academic)
Identifiers
urn:nbn:se:uu:diva-89599 (URN)
Available from: 2002-01-18 Created: 2002-01-18 Last updated: 2010-01-13Bibliographically approved
5. Study of oxygen-C60 compound formation by NEXAFS and RIXS
Open this publication in new window or tab >>Study of oxygen-C60 compound formation by NEXAFS and RIXS
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2001 In: European Physical Journal D, Vol. 16, p. 357-360Article in journal (Refereed) Published
Identifiers
urn:nbn:se:uu:diva-89600 (URN)
Available from: 2002-01-18 Created: 2002-01-18Bibliographically approved
6. Single-Walled Carbon Nanotubes Studied By Resonant Inelastic X-ray Scattering Spectroscopy
Open this publication in new window or tab >>Single-Walled Carbon Nanotubes Studied By Resonant Inelastic X-ray Scattering Spectroscopy
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Manuscript (Other academic)
Identifiers
urn:nbn:se:uu:diva-89601 (URN)
Available from: 2002-01-18 Created: 2002-01-18 Last updated: 2010-01-13Bibliographically approved
7. Transition Metal-C60 Compound Formation Studied by Resonant Inelastic X-Ray Scattering
Open this publication in new window or tab >>Transition Metal-C60 Compound Formation Studied by Resonant Inelastic X-Ray Scattering
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Manuscript (Other academic)
Identifiers
urn:nbn:se:uu:diva-89602 (URN)
Available from: 2002-01-18 Created: 2002-01-18 Last updated: 2010-01-13Bibliographically approved
8. Bonding Mechanism in the Transition-Metal Fullerides Studied by Symmetry-Selective Resonant X-ray Inelastic Scattering
Open this publication in new window or tab >>Bonding Mechanism in the Transition-Metal Fullerides Studied by Symmetry-Selective Resonant X-ray Inelastic Scattering
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2001 (English)In: Phys. Rev. B, Vol. 63, p. 085418-Article in journal (Refereed) Published
National Category
Natural Sciences
Identifiers
urn:nbn:se:uu:diva-89603 (URN)
Available from: 2002-01-18 Created: 2002-01-18 Last updated: 2012-04-02Bibliographically approved
9. Bond Formation in Titanium Fulleride Compounds Studied Through X-ray Emission Spectroscopy
Open this publication in new window or tab >>Bond Formation in Titanium Fulleride Compounds Studied Through X-ray Emission Spectroscopy
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2001 (English)In: Phys. Rev. B, Vol. 63, p. 115117-Article in journal (Refereed) Published
National Category
Natural Sciences
Identifiers
urn:nbn:se:uu:diva-89604 (URN)
Available from: 2002-01-18 Created: 2002-01-18 Last updated: 2012-04-02Bibliographically approved
10. Non-destructive chemical analysis of sandwich structures by means of soft X-ray emission
Open this publication in new window or tab >>Non-destructive chemical analysis of sandwich structures by means of soft X-ray emission
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1999 In: Thin Solid Films, Vol. 344, p. 35-38Article in journal (Refereed) Published
Identifiers
urn:nbn:se:uu:diva-89605 (URN)
Available from: 2002-01-18 Created: 2002-01-18Bibliographically approved
11. Excitation Dynamics of the Beryllium Hypersatellite
Open this publication in new window or tab >>Excitation Dynamics of the Beryllium Hypersatellite
Manuscript (Other academic)
Identifiers
urn:nbn:se:uu:diva-89606 (URN)
Available from: 2002-01-18 Created: 2002-01-18 Last updated: 2010-01-13Bibliographically approved

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