Effects of hydrogen on the dynamics of the Mo{sub 0.95}Re{sub 0.05}(ll0) surface
- Tennessee Univ., Knoxville, TN (United States)
The effect of adsorbed H on the Mo{sub 0.95}Re{sub 0.05}(110) surface has been investigated. Results obtained from low-energy electron diffraction, high-resolution electron energy loss spectroscopy (HREELS) and angle-resolved ultra-violet photoemission spectroscopy are presented. A (2{times}2) LEED pattern is observed for H coverages around {Theta} {approximately} 0.6 ML and is attributed to reconstruction of the substrate. At higher coverages, a (1{times}1) pattern is observed. Two peaks are observed at loss energies of 99 and 153 meV in the HREELS spectra for the H-saturated Mo{sub 0. 95}Re{sub 0.05}(110) surface. Both peaks show an isotopic shift, confirming that they are due to hydrogen vibrational modes and a quasi-trigonal adsorption site is consistent with these observations. A two dimensional Fermi surface was determined for the H-saturated Mo{sub 0.95}Re{sub 0.05}(110) surface. The Fermi-surface nesting vector was observed at the place where theoretical calculations predict it to occur on H-saturated Mo(110) and it may be related to the phonon anomaly observed for this surface.
- Research Organization:
- Oak Ridge National Lab., TN (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 205079
- Report Number(s):
- CONF-9509312--1; ON: DE96005628
- Country of Publication:
- United States
- Language:
- English
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