Evidence of quantum motion of hydrogen on Pd(111) in helium-diffraction data
- 17 June 1991
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 66 (24) , 3164-3167
- https://doi.org/10.1103/physrevlett.66.3164
Abstract
We investigate the behavior of hydrogen on the Pd(111) surface by elastic scattering of a monoenergetic thermal He beam. Dramatic changes in the intensities of the diffraction peaks are observed as a function of sample temperature in the range of 140–350 K, and are attributed to changes in H coverage. A consistent explanation of the diffraction data is achieved when we consider the H system as a correlated quantum fluid where particle delocalization occurs at medium and low coverages.Keywords
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