Reconstructive phase transitions and effective adsorbate-adsorbate interactions: H/Mo(100) and H/W(100)
Low-energy electron-diffraction and infrared-absorption measurements of H/Mo(100) and H/W(100) surfaces show that, at low hydrogen coverages, the effective H--H interactions are very different for the two substrates, leading to island formation on Mo(100) and to a uniform H layer on W(100). The resu...
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Veröffentlicht in: | Physical review letters 1987-05, Vol.58 (18), p.1877-1880 |
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container_issue | 18 |
container_start_page | 1877 |
container_title | Physical review letters |
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creator | PRYBYLA, J. A ESTRUP, P. J YING, S. C CHABAL, Y. J CHRISTMAN, S. B |
description | Low-energy electron-diffraction and infrared-absorption measurements of H/Mo(100) and H/W(100) surfaces show that, at low hydrogen coverages, the effective H--H interactions are very different for the two substrates, leading to island formation on Mo(100) and to a uniform H layer on W(100). The results can be explained by a phonon-mediated interaction mechanism for the H adatoms, according to which the difference in behavior is due to the difference in the coupling between substrate distortions induced by the individual adatoms. It is concluded that a realistic treatment of the adatom interactions should go beyond the rigid-substrate model and include the crucial role of soft phonons. 21 ref.--AA |
doi_str_mv | 10.1103/physrevlett.58.1877 |
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The results can be explained by a phonon-mediated interaction mechanism for the H adatoms, according to which the difference in behavior is due to the difference in the coupling between substrate distortions induced by the individual adatoms. It is concluded that a realistic treatment of the adatom interactions should go beyond the rigid-substrate model and include the crucial role of soft phonons. 21 ref.--AA</abstract><cop>Ridge, NY</cop><pub>American Physical Society</pub><pmid>10034561</pmid><doi>10.1103/physrevlett.58.1877</doi><tpages>4</tpages></addata></record> |
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subjects | Applied sciences Chemistry Cross-disciplinary physics: materials science rheology Exact sciences and technology General and physical chemistry Materials science Metals, semimetals and alloys Metals. Metallurgy Physics Solid-gas interface Specific materials Surface physical chemistry |
title | Reconstructive phase transitions and effective adsorbate-adsorbate interactions: H/Mo(100) and H/W(100) |
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