Using Fano effect measurements upon polycrystalline Ce, we have observed a phase reversal between the spectral structure at the Fermi edge and the other 4f 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.
J. G. Tobin et al., "Evidence of Dynamical Spin Shielding in Ce from Spin-Resolved Photoelectron Spectroscopy," Europhysics Letters, Institute of Physics - IOP Publishing, Jan 2007.
The definitive version is available at http://dx.doi.org/10.1209/0295-5075/77/17004
Keywords and Phrases
Fano Effect Measurements; Fermi Edge; Polycrystalline Ce
Article - Journal
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