Initial stages in the formation of a CsAu surface alloy
M. V. Knat’koA. F. Ioffe Physicotechnical Institute, Russian Academy of Sciences, St. PetersburgM. N. LapushkinA. F. Ioffe Physicotechnical Institute, Russian Academy of Sciences, St. PetersburgV. I. PaleevA. F. Ioffe Physicotechnical Institute, Russian Academy of Sciences, St. Petersburg
ABI
Abstract
Threshold photoemission spectroscopy is used to study the formation of a CsAu alloy during deposition of Cs on an Au substrate. It is shown that both the Cs surface layer and the CsAu near-surface alloy undergo indirect photoexcitation. It is found that the formation of a CsAu alloy is accompanied by a sharp rise (by several factors of ten) in the photoemission current while the photoemission threshold remains almost constant. This behavior is attributed to the formation of a band of electronic states near the Fermi level.
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