| 1. |
- Denecke, R, et al.
(author)
-
Beamline I511 at MAX II, capabilities and performance
- 1999
-
In: JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA. - : ELSEVIER SCIENCE BV. - 0368-2048. ; 103, s. 971-977
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Journal article (other academic/artistic)abstract
- The new undulator beamline I511 at MAX-lab, now under commissioning, has been optimized for X-ray emission and photoelectron spectroscopies. Using an SX-700 high flux monochromator the accessible photon energy range is from 90 eV to about 1500 eV. The per
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| 2. |
- Fohlisch, A, et al.
(author)
-
Beyond the chemical shift: Vibrationally resolved core-level photoelectron spectra of adsorbed CO
- 1998
-
In: PHYSICAL REVIEW LETTERS. - : AMERICAN PHYSICAL SOC. - 0031-9007. ; 81:8, s. 1730-1733
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Journal article (other academic/artistic)abstract
- Vibrational fine structure has been observed in the Cls and O1s photoelectron lines of CO adsorbed on Ni(100). This allows a detailed separation of vibrational and electronic contributions to the line profile. The main line is found to represent the fully
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| 3. |
- Karis, O, et al.
(author)
-
One-step and two-step description of deexcitation processes in weakly interacting systems
- 1996
-
In: PHYSICAL REVIEW LETTERS. - : AMER INST PHYSICS. ; 76:8, s. 1380-1383
-
Journal article (other academic/artistic)abstract
- The origin of one- and two-step behavior of core-hole decay processes is identified in connection with high resolution autoionization spectra for Ar/Pt(111). The spectra simultaneously show features of the two types (resonant Raman vs Auger-like behavior)
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| 4. |
- Lemke, L, et al.
(author)
-
Magnetic extended x-ray absorption fine structure at the L-3,L-2 edges of 3d elements
- 1998
-
In: JOURNAL OF PHYSICS-CONDENSED MATTER. - : IOP PUBLISHING LTD. - 0953-8984. ; 10:8, s. 1917-1930
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Journal article (other academic/artistic)abstract
- We report normal and magnetic extended x-ray absorption fine-structure (EXAFS) measurements made on 30 ML Fe films on Cu(001) substrates at the L-3,L-2 edges. The magnetic EXAFS at the L edges of 3d metals is particularly important as it can be used to pr
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| 5. |
- Martensson, N, et al.
(author)
-
Coherent and incoherent processes in resonant photoemission
- 1997
-
In: APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING. - 0947-8396. ; 65:2, s. 159-167
-
Journal article (other academic/artistic)abstract
- The basis for resonant photoemission is discussed in connection with data for a physisorption system, Ar/Pt(111) and a 3d transition metal, Ni(100). For Ar/Pt(111) the quasi-localized character of the intermediate state leads to two types of features in t
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| 6. |
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| 7. |
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| 8. |
- Srivastava, P, et al.
(author)
-
Magnetic extended x-ray absorption fine structure at the L-3,L-2 edges of Fe and Co on Cu(001)
- 1998
-
In: JOURNAL OF APPLIED PHYSICS. - : AMER INST PHYSICS. - 0021-8979. ; 83:11, s. 7025-7027
-
Journal article (other academic/artistic)abstract
- We report magnetic extended x-ray absorption fine structure (EXAFS) measurements on 30 monolayer Fe and Co films on Cu(001) substrates at L-3,L-2 edges. For 3d transition metals, the magnetic EXAFS at the L edges is of great interest since it probes final
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| 9. |
- Weinelt, M, et al.
(author)
-
Resonant photoemission at the 2p edges of Ni: Resonant Raman and interference effects
- 1997
-
In: PHYSICAL REVIEW LETTERS. - 0031-9007. ; 78:5, s. 967-970
-
Journal article (other academic/artistic)abstract
- Unambiguous evidence for resonant photoemission in Ni is presented. Interference effects are identified at the 2p edges for the valence band and the 6 eV satellite. A rapid transition from a resonant Raman to an Auger-like regime shows that the core-excit
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| 10. |
- Ahuja, R, et al.
(author)
-
Theoretical and experimental study of the graphite 1s x-ray absorption edges
- 1996
-
In: PHYSICAL REVIEW B-CONDENSED MATTER. - : AMER INST PHYSICS. - 0163-1829. ; 54:20, s. 14396-14404
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Journal article (other academic/artistic)abstract
- Theoretical calculations in combination with experiments for the pi* and sigma* x-ray absorption edges are reported for graphite. Theory and experiment agree well for the leading pi* and sigma* resonances. By comparing theoretical calculations for a singl
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| 11. |
- Andersson, S, et al.
(author)
-
CO dissociation characteristics on size-distributed rhodium islands on alumina model substrates
- 1998
-
In: JOURNAL OF CHEMICAL PHYSICS. - : AMER INST PHYSICS. - 0021-9606. ; 108:7, s. 2967-2974
-
Journal article (other academic/artistic)abstract
- The dissociation of CO on size-distributed Rh particles supported on a thin alumina film has been studied with high resolution X-ray Photoelectron Spectroscopy (XPS) and X-ray Absorption Spectroscopy (XAS). Adsorbed CO dissociates upon heating to temperat
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| 12. |
- Andersson, S, et al.
(author)
-
Metal-oxide interaction for metal clusters on a metal-supported thin alumina film
- 1999
-
In: SURFACE SCIENCE. - : ELSEVIER SCIENCE BV. ; 442:1
-
Other publication (other academic/artistic)abstract
- The interaction between deposited metal clusters and a thin model alumina film grown on NiAl(110) have been studied using X-ray absorption spectroscopy (XAS) and core and valence photoelectron spectroscopy. A lower limit for the fundamental gap of the sup
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| 13. |
- Andersson, S, et al.
(author)
-
Temperature dependent XPS study of CO dissociation on small Rh particles
- 1998
-
In: VACUUM. - : PERGAMON-ELSEVIER SCIENCE LTD. - 0042-207X. ; 49:3, s. 167-170
-
Journal article (other academic/artistic)abstract
- We have used temperature dependent X-ray Photoelectron Spectroscopy (XPS) to study the heating-induced CO dissociation on oxide-supported Rh particles through observation of changes undergone by the adsorbate CO and the formation of atomic carbon from the
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| 14. |
- Bennich, P, et al.
(author)
-
Photoemission study of K on graphite
- 1999
-
In: PHYSICAL REVIEW B-CONDENSED MATTER. - : AMERICAN PHYSICAL SOC. - 0163-1829. ; 59:12, s. 8292-8304
-
Journal article (other academic/artistic)abstract
- The physical and electronic structure of the dispersed and (2 x 2) phases of K/graphite have been characterized by valence and core-level photoemission. Charge transfer from K to graphite is found to occur at all coverages, and includes transfer of charge
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| 15. |
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| 16. |
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| 17. |
- Bruhwiler, P, et al.
(author)
-
Vibronic coupling in the photoemission bands of condensed C-60
- 1997
-
In: CHEMICAL PHYSICS LETTERS. - : ELSEVIER SCIENCE BV. - 0009-2614. ; 279:1-2, s. 85-91
-
Journal article (other academic/artistic)abstract
- We present photoelectron spectra for the highest occupied molecular orbital (HOMO) of C-60 in the gas phase and a two-dimensional (2D) condensed layer. For low temperatures the similarity in the spectra is striking and places a strict upper limit of 0.07
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| 18. |
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| 19. |
- Davila, ME, et al.
(author)
-
Magnetic circular X-ray dichroism of metastable epitaxial Fe on Cu(100)
- 1999
-
In: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS. - : ELSEVIER SCIENCE BV. - 0304-8853. ; 197, s. 120-122
-
Journal article (other academic/artistic)abstract
- We report L-edge Magnetic Circular X-Ray Dichroism measurements at 30 K of Fe deposited at 100 K on Cu (1 0 0) in the form of ultrathin films and a wedge. The orbital and spin moments of the wedge differ from those obtained for uniform thickness films. Fo
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| 20. |
- Dunn, JH, et al.
(author)
-
In situ MCD magnetometry in the ultrathin limit: Fe on Cu(100)
- 1997
-
In: JOURNAL DE PHYSIQUE IV. - : EDITIONS PHYSIQUE. - 1155-4339. ; 7:C2, s. 383-387
-
Journal article (other academic/artistic)abstract
- By means of Magnetic Circular Dichroism in X-ray Absorption Spectroscopy we investigated the magnetic properties of fct Fe films stabilised by epitaxial growth on the Cu(100) surface. These are compared to bcc like Fe films. The films were characterised i
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| 21. |
- Dunn, JH, et al.
(author)
-
Linear magnetic dichroism of thin Fe films on Cu(100)
- 1999
-
In: JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA. - : ELSEVIER SCIENCE BV. - 0368-2048. ; 103, s. 463-466
-
Journal article (other academic/artistic)abstract
- A series of XPS measurements have been performed on the Fe/Cu(100) system. Using linearly polarised X-rays from an undulator source, magnetic information is evident in the spectra when the magnetisation direction is reversed. These measurements show that
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| 22. |
|
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| 23. |
- Dunn, JH, et al.
(author)
-
Magnetism of thin Fe films on Cu(100)
- 1996
-
In: PHYSICAL REVIEW B-CONDENSED MATTER. - : AMER INST PHYSICS. - 0163-1829. ; 54:16, s. 11157-11160
-
Journal article (other academic/artistic)abstract
- Magnetic moments have been determined for the fct and bce structural phases of Fe, stabilized on the (100) surface of Cu, from magnetic-circular-dichroism measurements. For the thin fct films, the spin and orbital moments are greatly increased to 3.4(7)mu
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| 24. |
- Fohlisch, A, et al.
(author)
-
Franck-Condon breakdown in core-level photoelectron spectroscopy of chemisorbed CO
- 1999
-
In: CHEMICAL PHYSICS LETTERS. - : ELSEVIER SCIENCE BV. - 0009-2614. ; 315:3-4, s. 194-200
-
Journal article (peer-reviewed)abstract
- The photon energy dependence of the vibrational fine structure in the Cls and Ols X-ray photoelectron main lines of chemisorbed CO on Ni(100) and Ru(0001) has been measured from 6 to 150 eV above the core-level thresholds. Significant deviations from the
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| 25. |
|
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| 26. |
- Frank, M, et al.
(author)
-
Particle size dependent CO dissociation on alumina-supported Rh: a model study
- 1997
-
In: CHEMICAL PHYSICS LETTERS. - : ELSEVIER SCIENCE BV. - 0009-2614. ; 279:1-2, s. 92-99
-
Journal article (other academic/artistic)abstract
- Via deposition of Ph from the gas phase onto a thin, well-ordered alumina film we have prepared various of alumina-supported Rh particle systems. The morphologies and particle sizes have been characterised with spot profile analysis LEED and STM measureme
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| 27. |
|
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| 28. |
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| 29. |
|
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| 30. |
- Libuda, J, et al.
(author)
-
Interaction of rhodium with hydroxylated alumina model substrates
- 1997
-
In: SURFACE SCIENCE. - : ELSEVIER SCIENCE BV. - 0039-6028. ; 384:1-3, s. 106-119
-
Journal article (other academic/artistic)abstract
- In order to investigate how metal growth and metal-oxide interaction depend on the chemical properties of oxide surfaces, we describe a modification procedure which allows the introduction of surface hydroxyl groups on a well-ordered Al2O3 film on NiAl(II
|
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| 31. |
- MARTENSSON, N
(author)
-
AUTOIONIZATION AS A TOOL FOR STUDYING ADSORBED ATOMS AND MOLECULES
- 1995
-
In: JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA. - : ELSEVIER SCIENCE BV. - 0368-2048. ; 72, s. 1-8
-
Journal article (other academic/artistic)abstract
- Autoionization spectroscopy provides a powerful tool to investigate the electronic structure of adsorbed atoms and molecules. Two applications of this technique are discussed. In the first example the x-ray absorption spectrum of molecularly adsorbed nitr
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| 32. |
- Martensson, N, et al.
(author)
-
On the origin of core-level binding energy shifts
- 1995
-
In: JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA. - : ELSEVIER SCIENCE BV. ; 75, s. 209-223
-
Journal article (other academic/artistic)abstract
- We present a general discussion of chemical shifts in core-level photoelectron spectroscopy. There are two different starting points that are commonly used for describing the important ingredients in the chemical shifts. In the first approach one starts o
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| 33. |
- Martensson, N, et al.
(author)
-
Resonant processes in the soft X-ray regime
- 1999
-
In: JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA. - : ELSEVIER SCIENCE BV. - 0368-2048. ; 100, s. 379-393
-
Journal article (other academic/artistic)abstract
- The phenomenon of resonant excitation of X-ray and electron emission spectra is discussed. The basic phenomena are demonstrated for Ni metal. The importance of the localization of the intermediate state is discussed in connection with spectra for adsorbed
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| 34. |
- Maxwell, AJ, et al.
(author)
-
C 1s ionisation potential and energy referencing for solid C-60 films on metal surfaces
- 1996
-
In: CHEMICAL PHYSICS LETTERS. - : ELSEVIER SCIENCE BV. - 0009-2614. ; 260:1-2, s. 71-77
-
Journal article (other academic/artistic)abstract
- We present a measurement of the C Is ionisation potential (IP) for solid C-60, as well as a reliable determination of the highest occupied molecular orbital (HOMO) IP. The difference between the gas phase and solid state measurements for the HOMO agrees w
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| 35. |
- MAXWELL, AJ, et al.
(author)
-
C-60 ON AL(111) - COVALENT BONDING AND SURFACE RECONSTRUCTION
- 1995
-
In: PHYSICAL REVIEW B-CONDENSED MATTER. - : AMER INST PHYSICS. ; 52:8
-
Other publication (other academic/artistic)abstract
- We present photoemission and C 1s photoabsorption data for an annealed monolayer C-60/Al(111), which show that a strong covalent bond is formed between the C-60 molecules and the substrate. Low-energy electron-diffraction and scanning tunneling microscopy
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| 36. |
- Maxwell, AJ, et al.
(author)
-
Electronic and geometric structure of C-60 on Al(111) and Al(110)
- 1998
-
In: PHYSICAL REVIEW B-CONDENSED MATTER. - : AMERICAN PHYSICAL SOC. - 0163-1829. ; 57:12, s. 7312-7326
-
Journal article (other academic/artistic)abstract
- Two new ordered monolayer phases of C-60 on Al surfaces have been studied using electron spectroscopies and low-energy electron diffraction (LEED). On Al(111), in addition to the previously reported (6x6) phase formed by evaporating with T-sample=620 K, a
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| 37. |
- Maxwell, AJ, et al.
(author)
-
Electronic structure study of KxC60 compounds with x>6
- 1995
-
In: CHEMICAL PHYSICS LETTERS. - : ELSEVIER SCIENCE BV. ; 247:3, s. 257-263
-
Journal article (other academic/artistic)abstract
- We present C 1s X-ray absorption and photoemission results for KxC60 with x > 6, the so-called 'superfullerides'. These are the first measurements of the unoccupied valence band for these systems and confirm that more than six electrons can be transferred
|
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| 38. |
- Maxwell, AJ, et al.
(author)
-
Length scales in core level excitation: C 1s x-ray absorption of C-60/Al
- 1997
-
In: PHYSICAL REVIEW LETTERS. - : AMER INST PHYSICS. - 0031-9007. ; 79:8, s. 1567-1570
-
Journal article (other academic/artistic)abstract
- We present evidence for atomic site-dependent excitonic effects in the x-ray absorption spectrum of an ordered chemisorbed monolayer of C-60/Al(110). We observe that the broadening in the 5t(1u)-derived resonance and the corresponding core level resonant
|
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| 39. |
|
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| 40. |
|
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| 41. |
- NILSSON, A, et al.
(author)
-
INITIAL AND FINAL-STATE RULES IN X-RAY SPECTROSCOPIES OF ADSORBATES
- 1995
-
In: PHYSICA B. - : ELSEVIER SCIENCE BV. - 0921-4526. ; 209:1-4, s. 19-22
-
Journal article (other academic/artistic)abstract
- The so-called ''initial and final state rules'' for X-ray absorption spectroscopy (XAS) and X-ray emission spectroscopy (XES) are applied to CO on Ni(1 0 0). In XAS the final state core hole strongly modifies the distribution of unoccupied valence states
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| 42. |
- Osma, J, et al.
(author)
-
Energy loss in electronic emission from solid surfaces
- 1997
-
In: PHYSICAL REVIEW B-CONDENSED MATTER. - : AMER INST PHYSICS. - 0163-1829. ; 56:7, s. 3644-3647
-
Journal article (other academic/artistic)abstract
- We investigate the energy loss from inelastic losses due to excitation of the substrate and neighboring atoms during the emission of electrons from atoms weakly adsorbed at solid surfaces. The ionization losses are important only for trajectories close to
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| 43. |
- Patthey, L, et al.
(author)
-
Adsorption of bi-isonicotinic acid on rutile TiO2(110)
- 1999
-
In: JOURNAL OF CHEMICAL PHYSICS. - 0021-9606. ; 110:12, s. 5913-5918
-
Journal article (other academic/artistic)abstract
- Bi-isonicotinic acid (2,2'-bipyridine- 4,4'-dicarboxylic acid) is the ligand of several organometallic dyes, used in photoelectrochemical applications. Therefore the atomic scale understanding of the bonding of this molecule to rutile TiO2(110) should giv
|
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| 44. |
- Puglia, C, et al.
(author)
-
A photoemission and XAS study of oxygen coadsorbed with a (2x2) layer of K on graphite
- 1997
-
In: SURFACE SCIENCE. - : ELSEVIER SCIENCE BV. - 0039-6028. ; 383:2-3, s. 149-161
-
Journal article (other academic/artistic)abstract
- We have studied the coadsorption of oxygen with a (2 x 2) monolayer of K on graphite. At least three different adsorption phases for oxygen have been found. Different spectroscopic techniques have been used in order to identify the different oxygen specie
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| 45. |
|
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| 46. |
|
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| 47. |
- Qvarford, M, et al.
(author)
-
Doping dependence of the O 1s is core-level photoemission in bi-Sr-Ca-Cu-O superconductors
- 1996
-
In: PHYSICAL REVIEW B-CONDENSED MATTER. - : AMER INST PHYSICS. - 0163-1829. ; 53:22, s. 14753-14756
-
Journal article (other academic/artistic)abstract
- The O 1s core level of three different Bi-Sr-Ca-Cu-O superconductors has been studied by means of high-resolution x-ray-photoelectron spectroscopy (XPS) and x-ray absorption spectroscopy (XAS). The O 1a XPS spectra could be decomposed into three component
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| 48. |
- Reimann, CT, et al.
(author)
-
Graphite surface topography induced by Ta cluster impact and oxidative etching
- 1998
-
In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS. - : ELSEVIER SCIENCE BV. - 0168-583X. ; 140:1-2, s. 159-170
-
Journal article (other academic/artistic)abstract
- Freshly cleaved highly oriented pyrolytic graphite (HOPG), when baked in air at approximate to 630 degrees C, forms one-monolayer (ML)-deep circular pits due to oxidation initiated at surface defect sites. We found that the areal density and depths of the
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| 49. |
- Reimann, CT, et al.
(author)
-
Oxidative etching of Ta-cluster-ion-bombarded highly-oriented pyrolytic graphite
- 1997
-
In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS. - : ELSEVIER SCIENCE BV. - 0168-583X. ; 122:3, s. 343-346
-
Journal article (other academic/artistic)abstract
- Bombardment of highly-oriented pyrolytic graphite by energetic monomer and cluster ions (555 eV/atom Ta-1(+), Ta-2(+), Ta-4(+) or Ta-9(+)) is used to introduce surface defects which, after baking in air at approximate to 630 degrees C, nucleate oxidation
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| 50. |
- Rotenberg, E, et al.
(author)
-
Local-field effects on photoemission of C-60
- 1996
-
In: PHYSICAL REVIEW B-CONDENSED MATTER. - 0163-1829. ; 54:8, s. R5279-R5282
-
Journal article (other academic/artistic)abstract
- The surface core-level shift in C 1s soft x-ray photoemission spectroscopy has been experimentally observed in films of C-60 on Al. A value of 0.100+/-0.025 eV has been determined. Theoretical calculations are presented which show that the core hole is un
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