Surface and bulk photoelectron diffraction from W(110) 4<i>f</i>core levels

Kim, B.; Chen, J.; Erskine, J. L.; Mei, W.; Wei, C. M.

doi:10.1103/physrevb.48.4735

Cited by 32 publications

(8 citation statements)

References 17 publications

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“…Apparently, however, diffraction of the outgoing electrons causes the layer-dependent intensities to vary somewhat from a simple escape-depth description. This is not uncommon for 4f 7/2 photoemission from W(110) [63,64]. The overall good agreement between Fig.…”

supporting

confidence: 66%

Core-level spectroscopy of the Pd/W(110) interface: Evidence of long-range Pd-island–W interactions at submonolayer Pd coverages

et al. 2009

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We have measured W 4f 7/2 core-level photoemission spectra from W(110) in the presence of Pd overlayers for coverages up to ∼1 pseudomorphic monolayer (ML). At coverages close to 0.05 ML a striking change in the W core-level spectrum is observed, which we interpret as indicating a long-range lateral effect of 2D Pd islands upon the W electronic structure in both the first and second W layers. As the coverage increases the long-range effect weakens and finally vanishes near 0.85 ML. Above this coverage the W spectra are typical for a W-based bimetallic interface, with the first-layer W atoms exhibiting a small interfacial core-level shift (−95 ± 5 meV) compared to the bulk atoms.

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confidence: 66%

Core-level spectroscopy of the Pd/W(110) interface: Evidence of long-range Pd-island–W interactions at submonolayer Pd coverages

et al. 2009

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“…19 This method uses the layer reflection as an expansion parameter, but sums all possible scattering events until numerical convergence is achieved. Inelastic damping and vibrational amplitudes used in the present analysis of Nb are similar to those in previous works on Ta 14 and W. 20 The calculation used a fully dynamical multiple-scattering method. Seventeen partial waves and 280 beams were used in the final-state multiple-scattering calculation.…”

Section: Multiple-scattering Calculationsmentioning

confidence: 95%

Photoelectron-Diffraction Studies of Nb(001)

Chien

Fang

et al. 1998

Surf. Rev. Lett.

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Photoelectron-diffraction studies of Nb(001) have been performed to determine the first-interlayer contraction using Mg Kα radiation (hν = 1253.6 eV) as an excitation source. Photoemission intensities of the 3d 5/2 core level were measured as a function of the polar angle along several azimuths on the single-crystal surface. The 202.3-eV (205.0-eV) binding energy for the 3d 5/2 (3d 3/2 ) core level was well resolved in the photoemission spectra, where the peak intensity could be easily evaluated by curve-fitting processes. Large oscillations of the 3d 5/2 intensity as a function of the polar angle due to forward-focusing were observed. Based on multiple-scattering calculations for several first-interlayer spacings ranging from the bulk value to 16% contraction, the best agreement with experiment was obtained for a (13 ± 5)% contraction of the first-interlayer spacing.

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“…The price to pay is that many multiple scattering paths must be included in the simulations, requiring a highly sophisticated theory. This is why even though the potentiality of low energy PD in conjunction with the use of SCLS was shown a few years ago [7,8], only very recently has an adequate theory become available, allowing us to actually determine surface structural parameters [9,10].…”

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confidence: 99%

Adsorption Site Determination by Means of Surface Core Level Shift High Energy Photoelectron Diffraction:Pd{110}(2×1)p2mg−CO
Locatelli
¹
,
Brena
²
,
Lizzit
³

et al. 1994
Phys. Rev. Lett.
50
2
13
0
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We propose a novel application of the photoelectron diffraction method for determining the adsorption site of an adsorbate, based on the diffraction of high kinetic energy photoelectrons originating from the topmost layer of the substrate. Sensitivity to the topmost layer is achieved by working at grazing emission angle and by means of the adsorbate induced surface core level shift. A simple single scattering theory is shown to be adequate to interpret the data. We apply the method to the Pd(110}(2 x 1)p2mg-CO system and provide clear evidence that CO adsorbs in the short bridge sites.PACS numbers: 61.14. Rq, 68.35.Bs, 82.65.My Photoelectron diffraction (PD) is a well-established technique for the determination of surface structures [1][2][3]. In PD the intensity of a core level photoemission peak is measured as a function of the emission angle and/

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Surface and bulk photoelectron diffraction from W(110) 4fcore levels

Cited by 32 publications

References 17 publications

Core-level spectroscopy of the Pd/W(110) interface: Evidence of long-range Pd-island–W interactions at submonolayer Pd coverages

Core-level spectroscopy of the Pd/W(110) interface: Evidence of long-range Pd-island–W interactions at submonolayer Pd coverages

Photoelectron-Diffraction Studies of Nb(001)

Adsorption Site Determination by Means of Surface Core Level Shift High Energy Photoelectron Diffraction:Pd{110}(2×1)p2mg−CO
Locatelli
¹
,
Brena
²
,
Lizzit
³

et al. 1994
Phys. Rev. Lett.
50
2
13
0
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Surface and bulk photoelectron diffraction from W(110) 4fcore levels

Cited by 32 publications

References 17 publications

Core-level spectroscopy of the Pd/W(110) interface: Evidence of long-range Pd-island–W interactions at submonolayer Pd coverages

Core-level spectroscopy of the Pd/W(110) interface: Evidence of long-range Pd-island–W interactions at submonolayer Pd coverages

Photoelectron-Diffraction Studies of Nb(001)

Adsorption Site Determination by Means of Surface Core Level Shift High Energy Photoelectron Diffraction:Pd{110}(2×1)p2mg−COLocatelli1, Brena2, Lizzit3 et al. 1994Phys. Rev. Lett.502130View full textAdd to dashboardCite

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Adsorption Site Determination by Means of Surface Core Level Shift High Energy Photoelectron Diffraction:Pd{110}(2×1)p2mg−CO
Locatelli
¹
,
Brena
²
,
Lizzit
³

et al. 1994
Phys. Rev. Lett.
50
2
13
0
View full text Add to dashboard Cite