期刊
CHEMICAL PHYSICS
卷 251, 期 1-3, 页码 141-149出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0301-0104(99)00305-5
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Ultrafast charge transfer processes from adsorbates to substrates are believed to occur on the timescale of (sub)-femtoseconds. In this paper we present experimental evidence for resonant tunneling of electrons at surfaces in the time regime ranging from <1 to similar to 50 fs. The technique used to measure these ultrafast processes is based on high-resolution spectroscopy of the decay of core-excited states. We use the natural lifetime of the core-excited states, which is on the order of a few femtoseconds for the systems investigated, as an internal clock of the adsorbate systems, (C) 2000 Elsevier Science B.V. All rights reserved.
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