Lifetimes of Shockley electrons and holes at Cu(111)

Article

关键词: SURFACE-STATE ELECTRONS;    IMAGE-POTENTIAL STATES;    INELASTIC LIFETIMES;    METAL-SURFACES;    PHOTOEMISSION;    SPECTROSCOPY;    DYNAMICS;    ENERGY;   

DOI  :  10.1103/PhysRevB.72.193401

来源: SCIE

【 摘 要 】

A theoretical many-body analysis is presented of the electron-electron inelastic lifetimes of Shockley electrons and holes at the (111) surface of Cu. For a description of the decay of Shockley states both below and above the Fermi level, single-particle wave functions have been obtained by solving the Schrodinger equation with the use of an approximate one-dimensional pseudopotential fitted to reproduce the correct bulk energy bands and surface-state dispersion. A comparison with previous calculations and experiment indicates that inelastic lifetimes are very sensitive to the actual shape of the surface-state single-particle orbitals beyond the (Gamma) over bar (k(parallel to)=0) point, which controls the coupling between the Shockley electrons and holes.

【 授权许可】

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