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Quantum Diffusion of H on Pt(111): Step Effects

Authors Zheng, Chaozhi HKUST affiliated (currently or previously)
Yeung, C.K. HKUST affiliated (currently or previously).
Loy, Michael Ming-tak View this author's profile
Xiao, Xudong HKUST affiliated (currently or previously)
Issue Date 2006
Source Physical Review Letters , v. 97, (16), October 2006, Article number 166101
Summary Using a linear optical diffraction technique, we have systematically investigated the defect effects on quantum surface diffusion of hydrogen on Pt(111) surfaces. The quantum tunneling effect was clearly observed for hydrogen diffusion at low temperatures as manifested by a leveling off of the diffusion coefficient on flat surfaces. The strong influence of surface defects on the quantum diffusion is in good agreement with the creation of an inhomogeneous surface with adsorption sites of different binding energies.
ISSN 0031-9007
Rights © 2006 The American Physical Society
Language English
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