Surface core level spectroscopy of transition metals: A new tool for the determination of their surface structure

Spanjaard, D.; Guillot, Claude; Desjonquères, M.C.; Tréglia, G.; Lecante, J.

doi:10.1016/0167-5729(85)90003-2

Cited by 266 publications

(60 citation statements)

References 119 publications

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“…(here defined to be > 0) is the heat of adsorption of an M atom on the Z-metal surface [75]. In the equivalent-cores approximation, then, the ACS should be close to the difference in heats of adsorption of a M atom on W(110) and an equivalent Re surface.…”

Section: Z E M Adsmentioning

confidence: 99%

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Core-level shifts at the Pt/W(110) monolayer bimetallic interface

et al. 2009

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We have measured W and Pt 4f7/2 core-level photoemission spectra from interfaces formed by ultrathin Pt layers on W(110), completing our core-level measurements of W(110)-based bimetallic interfaces involving the group-10 metals Ni, Pd, and Pt. With increasing Pt coverage the sequence of W spectra can be described using three interfacial core-level peaks with binding-energy (BE) shifts (compared to the bulk) of −0.220 ± 0.015, −0.060 ± 0.015, and +0.110 ± 0.010 eV. We assign these features to 1D, 2D pseudomorphic (ps), and 2D closed-packed (cp) Pt phases, respectively. For ~1 ps ML the Pt 4f7/2 BE is 71.40 ± 0.02 eV, a shift of +0.46 ± 0.09 eV with respect to the BE of bulk Pt metal. The W 4f7/2 core-level shifts induced by all three adsorbates are semiquantitatively described by the Born-Haber-cycle based partial-shift model of Nilsson et al. [Phys. Rev. B 38 (1988) 10357]. As with Ni/W(110), the difference in W 4f7/2 binding energies between ps and cp Pt phases has a large structural contribution. The Pt 4f lineshape is consistent with a small density of states at the Fermi level, reflective of the Pt monolayer having noble-metal-like electronic structure.

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Section: Z E M Adsmentioning

confidence: 99%

“…A number of Born-Haber-cycle based approaches have been used to describe core-level BE shifts [39,68,[73][74][75][76]. For bimetallic interfaces the most straightforward is the partial-shift model of Nilsson et al [39], which we use here to discuss the W 4f7/2 interfacial shifts.…”

Section: Born-haber-cycle Analysis Of the Interfacial Shiftsmentioning

confidence: 99%

Core-level shifts at the Pt/W(110) monolayer bimetallic interface

et al. 2009

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“…There have been a number of approaches, using BornHaber cycles, to describe these energy differences [63,[77][78][79][80][81]. The approach most useful for discussing shifts at a bimetallic interface is the partial-shift model of Nilsson et al [63], which we utilize to discuss the Ni induced shifts measured here.…”

Section: Born-haber Cycle Analysis Of the Ni-induced Shiftsmentioning

confidence: 99%

Core-level spectroscopy of the Ni/W(110) interface: Correlation of W interfacial core-level shifts with first-layer Ni phases

et al. 2008

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We have measured W 4f 7/2 core-level photoemission spectra from W(110) in the presence of Ni overlayers, from ∼0.2 to ∼3 monolayers. Interfacial core-level shifts associated with first-layer Ni phases have been identified: −230 ± 15 meV for the 1×1 pseudomorphic phase and −70 ± 7 meV for the 7×1 close-packed commensurate phase. At higher Ni coverages the interfacial core-level shift is −100 ± 10 meV. These shifts are analyzed using the partial-shift model of Nilsson et al. [Phys. Rev. B 38 (1988) 10357]; the analysis indicates that the difference in binding energies between the 1×1 and 7×1 phases has a large contribution from structural differences between the two phases.

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“…The various possible oxide surface terminations should exhibit surface-to-bulk core level shifts, although the extent of the surface-to-bulk core level shift may vary widely. Surface reconstructions, as well as major surface lattice relaxations can complicate the observed surfaceto-bulk core level shift [1]. We have chosen to demonstrate the existence of a Li 1s surface-to-bulk core level shift for lithium tetraborate, Li 2 B 4 O 7 for the (11 0) orientation since the (11 0) surface termination is seen to have a largely non-polar surface termination [11,12].…”

Section: Introductionmentioning

confidence: 99%

“…The study of surface-to-bulk core level shifts has a long and rich history [1,2] and, from the outset, has been given considerable theoretical support [3][4][5][6][7]. Application of the technique to alkalimetal-containing compounds, in particular dielectric compounds should yield very large surface-to-bulk core level binding energy shifts.…”

Section: Introductionmentioning

confidence: 99%

The surface core level shift for lithium at the surface of lithium borate

Wooten

Ketsman

Xiao

et al. 2010

Physica B: Condensed Matter

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Petrosky, J. C.; McClory, J.; Burak, Ya. V.; Adamiv, V. T.; and Dowben, Peter A., "The surface core level shift for lithium at the surface of lithium borate" (2009 Keywords:Oxide dielectric layers Lithium tetraborate Surface-to-bulk core level shift a b s t r a c t The shallow Li 1s core level exhibits a surface-to-bulk core level shift for the stoichiometric Li 2 B 4 O 7 (11 0) surface. Angle-resolved photoemission spectroscopy was used to indentify Li 1s bulk and surface core level components at binding energies À 56.5 7 0.4 and À 53.7 7 0.5 eV, respectively. We find photoemission evidence for surface states of Li 2 B 4 O 7 (11 0) that exist in the gap of the projected bulk density of states. The existence of surface states is consistent with the large surface-to-bulk core level shift for the Li 1s core.

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Surface core level spectroscopy of transition metals: A new tool for the determination of their surface structure

Cited by 266 publications

References 119 publications

Core-level shifts at the Pt/W(110) monolayer bimetallic interface

Core-level shifts at the Pt/W(110) monolayer bimetallic interface

Core-level spectroscopy of the Ni/W(110) interface: Correlation of W interfacial core-level shifts with first-layer Ni phases

The surface core level shift for lithium at the surface of lithium borate

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