About cookies on this site Our websites require some cookies to function properly (required). In addition, other cookies may be used with your consent to analyze site usage, improve the user experience and for advertising. For more information, please review your options. By visiting our website, you agree to our processing of information as described in IBM’sprivacy statement. To provide a smooth navigation, your cookie preferences will be shared across the IBM web domains listed here.
Publication
Physical Review B
Paper
Highly resolved surface shifts in a mixed-valent system: EuPd2Si2
Abstract
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.