Photoemission studies of chiral metal surfaces using circularly polarized synchrotron radiation
Attard, GA, Watson, D, Seddon, EA, Cornelius, SM, Herrero, E and Feliu, J (2001) Photoemission studies of chiral metal surfaces using circularly polarized synchrotron radiation Physical Review B - Condensed Matter and Materials Physics, 64 (11). pp. 1154081-1154086.
phys rev b 2001.pdf
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In an attempt to measure classical circular dichroism (CD) in the photoemission of electrons from a solid surface, valence-band photoemission from clean and adsorbate-covered chiral metal surfaces has been investigated using circularly polarized synchrotron radiation. An experimental geometry was used whereby q̄, the polarization of the radiation, k̄, the wave vector of the photoemitted electrons, and n̄, the surface normal, were coplanar. It was anticipated that by doing this, so-called CDAD (circular dichroism in the angular distribution) effects associated with chiral photoemission geometries would be decoupled from classical CD arising from the difference in absorption cross-section for left and right circularly polarized light of electrons in energy states associated with R and S kinks. However, from the magnitude of the effects observed, it is evident that any classical CD features in the photoelectron spectrum arising from kinks, including photoemission from surface states or resonances, are swamped by other dichroic effects. We conclude that final-state effects in the diffraction of photoelectrons dominate the intensity of all peaks observed in angle-resolved photoemission from chiral, single crystal, metal surfaces using circularly polarized photons.
|Divisions :||Faculty of Engineering and Physical Sciences > Chemistry|
|Date :||15 September 2001|
|Identification Number :||10.1103/PhysRevB.49.15682|
|Additional Information :||Copyright 2001 The American Physical Society.|
|Depositing User :||Symplectic Elements|
|Date Deposited :||23 Aug 2013 09:12|
|Last Modified :||23 Sep 2013 20:15|
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