Noble-metal dark-edge fermiology: core-hole memory and the "Zeeman Auger" effect
Eric L. Shirley, Joseph Woicik, Conan Weiland, Ahmed Rumaiz, Charles Cardot, Joshua Kas, John Rehr
Gold and platinum have the face-centered-cubic crystal structure, are considered noble metals, and differ by one in atomic number. Near-edge M4,5 x-ray absorption and resonant M4,5N6,7N6,7 Auger spectroscopy reveal "dark" edges and a photon-energy-dependence of Auger electron (4f12 final-state) energy distributions. These results are a direct consequence of a delayed onset of d-to-f transitions and space quantization of the 3d hole prepared by photoexcitation that is predominantly d-to-p vs d-to-f. This study showcases the centrifugal barrier for f-wave electrons and spectral evolution arising from the existence of multiple intermediate-state channels and final states for both photoexcitation and Auger decay.
, Woicik, J.
, Weiland, C.
, Rumaiz, A.
, Cardot, C.
, Kas, J.
and Rehr, J.
Noble-metal dark-edge fermiology: core-hole memory and the "Zeeman Auger" effect, Physical Review Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=932427
(Accessed August 19, 2022)