Two-dimensional electron gas at noble-metal surfaces |
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Authors: | L Bürgi N Knorr H Brune MA Schneider K Kern |
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Institution: | Institut de Physique Expérimentale, EPFL, 1015 Lausanne, Switzerland, CH
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Abstract: | The electrons of the surface states on the (111) surfaces of the noble metals Au, Ag, and Cu form a quasi-two-dimensional
(2D) free electron gas which is confined to the first few atomic layers at the crystal surface. They are scattered by the
potential associated with surface defects, e.g. impurity atoms, adatoms, or step edges, leading to quantum-interference patterns
in the local density of states around these defects. We have used the quantum-interference phenomena to quantitatively measure
the electron phase-relaxation length and to probe long-range adsorbate interactions.
Received: 12 October 2001 / Accepted: 23 October 2001 / Published online: 3 April 2002 |
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Keywords: | PACS: 68 37 Ef 73 20 At 72 10 Fk 72 15 Lh |
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