Work function oscillation of Pb quantum islands on Cu(111) surface: Observation by Gundlach oscillation

C. L. Lin, M. C. Yang, W. B. Su, S. P. Lin, S. M. Lu, H. Y. Lin, C. S. Chang, T. Y. Fu, Tien T. Tsong

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

The Gundlach oscillation in scanning tunneling spectroscopy is used to measure the work function of Pb quantum islands grown on a Cu(111) substrate. The results reveal that the work function varies in oscillation with island thickness, which can be attributed to the existence of the quantum well states within the islands. The undulation of the work function is consistent with the theoretical calculations for a thickness from 6 to 15 atomic layers. While the island is grown layer-by-layer, it is found that the work function decreases (increases) whenever one (two) subband(s) is(are) added to the occupied states of the island.

Original languageEnglish
Pages (from-to)855-862
Number of pages8
JournalChinese Journal of Physics
Volume48
Issue number6
Publication statusPublished - 2010 Dec 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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