Direct measurements of the L -gap surface states on the (111) face of noble metals by photoelectron spectroscopy
作者： F. Reinert , G. Nicolay , S. Schmidt , D. Ehm , S. Hüfner
DOI: 10.1103/PHYSREVB.63.115415
关键词: X-ray photoelectron spectroscopy 、 Scanning tunneling spectroscopy 、 Energy (signal processing) 、 Electron 、 Resolution (electron density) 、 Atomic physics 、 Dispersion relation 、 Fermi surface 、 Surface states 、 Physics
摘要: We present a comprehensive photoemission study of the L-gap surface states (111) surfaces Cu, Ag, and Au by high-resolution angle-resolved photoelectron spectroscopy (PES). With an angular resolution about $\ensuremath{\Delta}\ensuremath{\theta}=\ifmmode\pm\else\textpm\fi{}0.15\ifmmode^\circ\else\textdegree\fi{}$ energy $\ensuremath{\Delta}E\ensuremath{\approx}3.5\mathrm{meV},$ our data establish new values for intrinsic lifetime broadening dispersion relation these states. compare results to recently published theoretical calculations measurements scanning tunneling (STS). In case Au(111) state, we observe particular qualitative discrepancies in comparison STS data: PES show split Fermi surface, possibly caused spin-orbit interaction state electrons.
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