Volume 77, Number 1, January 2007
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||05 January 2007|
Evidence of dynamical spin shielding in Ce from spin-resolved photoelectron spectroscopy
Lawrence Livermore National Laboratory - Livermore, CA, USA
2 University of Missouri-Rolla - Rolla, MO, USA
Corresponding author: Tobin1@LLNL.Gov
Accepted: 7 November 2006
Using Fano effect measurements upon polycrystalline Ce, we have observed a phase reversal between the spectral structure at the Fermi edge and the other derived feature near a binding energy of 2 eV. The Fano effect is the observation of spin polarized photoelectron emission from nonmagnetic materials, under chirally selective excitation, such as circularly polarized photons. The observation of phase reversal between the two peaks is a direct experimental proof of Kondo shielding in Ce, confirming the predictions of Gunnarsson and Shoenhammer, albeit with a small modification.
PACS: 71.28.+d – Narrow-band systems; intermediate-valence solids / 72.25.Fe – Optical creation of spin polarized carriers / 79.60.-i – Photoemission and photoelectron spectra
© Europhysics Letters Association, 2007
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