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Title of article :
Role of final states in photoemission from Al(1 1 1)
Author/Authors :
Krasovskii، نويسنده , , E.E. and Schattke، نويسنده , , W. and Ji???ek، نويسنده , , P. and Dudr، نويسنده , , V. and Bartos، نويسنده , , I.، نويسنده ,
Issue Information :
هفته نامه با شماره پیاپی سال 2007
Pages :
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Abstract :
Enhancement of surface state peaks in angle resolved ultraviolet photoelectron spectra (ARUPS) from the Al(1 1 1) surface is studied experimentally and theoretically within the one-step model of photoemission. The resonant enhancement of the surface state emission is explained by the crucial role of elastic scattering of the outgoing electron. Dipole transitions to evanescent states in the final bands of the crystal are shown to determine photoemission at the resonant photon energy. The band structure based explanation is confirmed by the measurements of electron reflectivity and of the fine structure of valence band spectra. The surface sensitivity of ARUPS is shown to depend strongly on the complex band structure of the crystal and to be finely tunable by the choice of photoemitted electron energy.
Keywords :
Synchrotron radiation photoelectron spectroscopy , Complex electron band structure , Ab initio theory , Surface states , Al(1  , Augmented plane waves , 1) , 1  , One-step model of photoemission
Journal title :
Surface Science
Link To Document :