D.E. Eastman, F.J. Himpsel, et al.
Journal of Magnetism and Magnetic Materials
We present an accurate determination of the energy dispersion (E vs k) and the first direct determination of the energy-dependent lifetime (E) of well-defined excited Bloch states in a crystal. Using angle-resolved photoemission for Cu(100), we find that the lifetime broadening increases from =1.2 eV (6 × 10-16 sec) to 1.8 eV (4 × 10-16 sec) for 1 conduction-band states ranging 10.5 to 13.5 eV above the Fermi level. The measured dispersion (2% accuracy) shows a reduced effective mass (m*m0=0.90-0.94) which is related to self-energy effects. © 1978 The American Physical Society.
D.E. Eastman, F.J. Himpsel, et al.
Journal of Magnetism and Magnetic Materials
D.E. Eastman, J.K. Cashion
Physical Review Letters
J.A. Knapp, F.J. Himpsel, et al.
Physical Review B
F.J. Himpsel, U.O. Karlsson, et al.
Physical Review Letters