Journal
PHYSICAL REVIEW LETTERS
Volume 105, Issue 13, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.105.136101
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Funding
- UK EPSRC [EP/E004962/1]
- Royal Society
- Weizmann-UK Joint Research Program
- EPSRC [EP/E004962/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/E004962/1] Funding Source: researchfish
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Measurements of the atomic-scale motion of H and D atoms on the Pt(111) surface, above the crossover temperature to deep tunneling, are presented. The results indicate that quantum effects are significant up to the highest temperature studied (250 K). The motion is shown to correspond to nearest neighbor hopping diffusion on a well defined fcc (111) lattice. The measurements provide information on the adiabatic potential of both the adsorption site and the transition state and give strong empirical support for a dissipative transition-state theory description of the quantum contribution to the motion.
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