Oliver Schilter, Alain Vaucher, et al.
Digital Discovery
The first momentum-resolved bremsstrahlung (or inverse photoemission) experiments using a tunable light detector in the energy range from 10 to 40 eV are reported. The experimental setup comprises a Pierce-type electron gun, a Seya monochromator, and a position-sensitive channel plate detector. An energy resolution of 0.3 eV at 20 eV has been achieved and the momentum resolution is 0.1 Å-1 The apparatus has been used to determine the energy band dispersion of unoccupied minority spin 3d states in Co. A ferromagnetic exchange splitting of 0.93 ±0.1 eV between the unoccupied spin-down and occupied spin-up states (measured with photoemission) is derived. Another application is the measurement of unoccupied adsorbate levels of CO on Ni( 111). Detecting the polarization of the photons (using the polarization-dependent reflectivity of the monochromator) enables us to identify the symmetry character of the adsorbate orbitals. For a Si( 111)—(7 × 7) surface, empty surface states are found in the band gap. © 1983, American Vacuum Society. All rights reserved.
Oliver Schilter, Alain Vaucher, et al.
Digital Discovery
Shiyi Chen, Daniel Martínez, et al.
Physics of Fluids
J.R. Thompson, Yang Ren Sun, et al.
Physica A: Statistical Mechanics and its Applications
Robert W. Keyes
Physical Review B