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Thermally Induced Core-Electron Binding-Energy Shifts in Transition Metals: An ExperimentalInvestigation of Ta(100)
Physical Review B
  • D. Mark Riffe, Utah State University
  • B. Kim
  • W. Hale
  • J. L. Erskine
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High-resolution photoemission spectra from the 4f7/2 levels of Ta(100) have been obtained between 77 K and room temperature. The data show an increase in both the surface and bulk core-level binding energies (BE’s) as the temperature is raised: between 77 and 293 K the bulk and surface BE’s increase by 31±3 and 13±2 meV, respectively. A model calculation of the bulk binding-energy increase, which is based upon the lattice expansion of the solid, is in good agreement with the experimental results and indicates that the shifts arise from both initial- and final-state effects that are of comparable magnitude. The model is further used to estimate thermally induced shifts for the whole 5d transition-metal series. © 1996 The American Physical Society.

Published by American Physical Society in Physical Review B. Publisher PDF is available for download through link above.

Citation Information
"Thermally Induced Core-Electron Binding-Energy Shifts in Transition Metals: An Experimental Investigation of Ta(100)," D. M. Riffe, B. Kim, W. Hale, and J. L. Erskine, Phys. Rev. B 54, 17118 (1996).