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タイトル: Photostimulated desorption of Xe from Au(001) surfaces via transient Xe− formation
著者: Ikeda, Akihiko
Matsumoto, Masuaki
Ogura, Shohei
Fukutani, Katsuyuki
Okano, Tatsuo
発行日: 2011年10月11日
出版者: American Physical Society
掲載誌情報: Physical Review B. 84, 15, 2011.10
抄録: Photostimulated desorption (PSD) of Xe atoms from the Au(001) surface in thermal and nonthermal regimes was investigated by the time-of-flight measurement at photon energies of 6.4 and 2.3 eV. Xe was desorbed in a thermal way at high laser fluence, which was in good agreement with theoretical simulations. At a low laser fluence, on the other hand, desorption was induced only at a photon energy of 6.4 eV by a nonthermal one-photon process. We argue that the nonthermal PSD occurs via transient formation of Xe− on Au(001). The lifetime of Xe− is estimated to be ∼15 fs with a classical model calculation. Whereas the electron affinity of Xe is negative in the isolated state, it is stabilized by the metal proximity effect.
URI: http://hdl.handle.net/2261/56953
ISSN: 1550-235X (online)
出現カテゴリ:014 自然科学
1341010 学術雑誌論文


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