Oscillatory adatom-adatom interactions of Pd adatoms on the W(2 1 1) surface

Tsu Yi Fu*, Yi Ju Hwang, Tien T. Tsong


研究成果: 雜誌貢獻會議論文同行評審

5 引文 斯高帕斯(Scopus)


Direct observations with the field ion microscope make it possible to determine the probability P(R) of finding two atoms on a surface at a separation R at equilibrium at temperature T. The free energy of interaction F(R) can be obtained from the relation: P(R) ∝ exp[-F(R)/kT]. On the W(211) plane, the interactions of two Pd atoms are studied for following cases: two Pd atoms in the same, in the nearest, the second-nearest and the third-nearest neighbor channels. When two Pd atoms are in the same channel, they combine easily to form a dimer of bond length 2.74 Å and the dimer can diffuse along the channel. Oscillatory behaviors of these interactions along the channel direction are observed. The further are the channels separated, the smaller is the maximum interaction energy. The maximum attractive energy in the same, nearest, second-nearest and third-nearest neighbor channel separations are 33.1, 23.0, 7.8, and 7.1 meV, respectively.

頁(從 - 到)462-466
期刊Surface Science
發行號1-3 PART 1
出版狀態已發佈 - 2004 9月 20
事件Proceedings of the 22nd European Conference on Surface Science - Prague, 捷克共和国
持續時間: 2003 9月 72003 9月 12

ASJC Scopus subject areas

  • 凝聚態物理學
  • 表面和介面
  • 表面、塗料和薄膜
  • 材料化學


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