Noble-metal dark-edge fermiology: Centrifugal barriers, core-hole memory, and the Zeeman Auger effect

Article

关键词: THRESHOLD;    SPECTRA;    AG;    DENSITY;    STATES;   

DOI  :  10.1103/PhysRevB.104.245131

来源: SCIE

【 摘 要 】

Gold and platinum both have the face-centered cubic crystal structure and are considered noble metals, yet they differ by one in atomic number. Near-edge M-4,M-5 x-ray absorption and resonant M4,5N6,7N6,7 Auger spectra reveal dark edges and a photon-energy dependence of Auger electron (4 f (12) final-state) energy distributions. These findings are a direct consequence of the delayed onset of d -> f transitions and space quantization of the 3d core hole prepared by photoexcitation that is predominantly d -> p vs d -> f near the edge, in agreement with theoretical predictions. 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.

【 授权许可】

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