Two-photon photoelectron spectroscopy of Pd(111)
Angle-resolved two-photon photoelectron spectroscopy has been used to study the normally unoccupied band structure of Pd(111). Photoemission features are studied as functions of excitation photon energy h..nu.., polarization state, and emission angle. Below h..nu.. = 4.9 eV, photoemission is dominated by excitation of bulk states near the Fermi level of ..lambda../sub 3/ symmetry through ..lambda../sub 1/ excited states between the Fermi and vacuum level. The kinetic energy of the corresponding spectral peak is found to increase according to 2 h..nu..-Phi, where Phi is the Pd(111) work function. At h..nu.. = 4.9 eV, a surface state with 0.65 +- 0.1 eV binding energy is found. The dispersion of this state with k/sub parallel/ is well-described by an effective mass m* equal to the free electron mass m/sub e/. This state is assigned as the n = 1 member of the image potential series of states. The relationship between the dispersion of this state and its position in the (111) projected bulk band gap is discussed.
- Research Organization:
- Sandia National Laboratories, Livermore, California 94550
- OSTI ID:
- 6512445
- Journal Information:
- J. Vac. Sci. Technol., A; (United States), Journal Name: J. Vac. Sci. Technol., A; (United States) Vol. 5:4; ISSN JVTAD
- Country of Publication:
- United States
- Language:
- English
Similar Records
Photoemission spectra and band structures of d-band metals. XI. Inverse photoemission from Pd(111)
High-resolution inverse-photoemission study of the Pd(111) surface
Related Subjects
360104* -- Metals & Alloys-- Physical Properties
BINDING ENERGY
ELECTRON SPECTROSCOPY
ELECTRONIC STRUCTURE
ELEMENTS
EMISSION
ENERGY
ENERGY GAP
ENERGY LEVELS
FERMI LEVEL
FUNCTIONS
METALS
PALLADIUM
PHOTOELECTRON SPECTROSCOPY
PHOTOEMISSION
PLATINUM METALS
POLARIZATION
SECONDARY EMISSION
SPECTROSCOPY
SURFACE PROPERTIES
TRANSITION ELEMENTS
WORK FUNCTIONS