F.J. Himpsel, T.A. Jung, et al.
Surface Review and Letters
Synchrotron-radiation-excited photoelectron spectroscopy is employed to study the bulk and surface states of the mixed-valent system EuPd2Si2, which undergoes a valence transition from Eu2.2+ at room temperature to Eu2.9+ at low temperature (2 100 K). The high resolution employed, coupled with a relatively large bulk-to-surface energy shift to the Eu2+ emission, allows a definitive identification of the bulk and surface states of Eu2+. The Eu3+ emission is not observed at room temperature, but is readily apparent in the low-temperature spectra. © 1982 The American Physical Society.
F.J. Himpsel, T.A. Jung, et al.
Surface Review and Letters
B. Reihl
Actinides 1986
J.H. Kaufman, Owen R. Melroy, et al.
Synthetic Metals
S.F. Fan, W.B. Yun, et al.
Proceedings of SPIE 1989