Journal Article10.1103/PHYSREVLETT.38.1138
Phase transition on Mo(100) and W(100) surfaces
415
TL;DR: In this paper, low-energy-electron-diffraction studies of carefully cleaned and annealed surfaces of molybdenum and tungsten (100) showed that a phase transition can be induced by lowering the temperature below 300 K. The phase transition is reversible and seemingly second order.
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Abstract: Low-energy-electron-diffraction studies of carefully cleaned and annealed surfaces of molybdenum (100) and tungsten (100) show that a phase transition can be induced by lowering the temperature below 300 K. The periodicity of the "reconstructed" surface is believed to be due to the formation of a displacement wave with a wavelength which is $2a$ ($a$ is the lattice parameter) for W(100) and $\ensuremath{\sim}2.2a$ for Mo(100). The phase transition is reversible and seemingly second order. It appears possible that displacements of this type also occur in chemisorption on these surfaces.
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Citations
Alkali metal (Li, K) induced reconstructions of the W(001) surface
TL;DR: In this article, Li and K atoms on the (001) surface of tungsten were found to exhibit remarkable differences in the surface core-level shifts (SCLS) of the W 4f level and in adsorbate-induced changes of the transition temperature of the substrate surface reconstruction.
2
Chapter II Theory of surface structure and bonding
J.E. Inglesfield
- 01 Jan 1995
TL;DR: In this paper, theoretical and computational studies of surface structure, based on solving the electronic Schrodinger equation, are described. But their work is done within the framework of density functional theory, in which the complicated manybody motion of all the electrons is replaced by an equivalent but simpler problem of each electron moving in an effective potential.
2
Lattice dynamics on surfaces by atom scattering
TL;DR: Recently, helium atom scattering from surfaces has been refined such that it allows studies of surface vibrational modes by investigating the inelastic component of the backscattered flux as discussed by the authors.
2
Vibrational excitations and adatom diffusion near the reconstruction transition of W(100)
TL;DR: In this article, a model of surface reconstruction and diffusion of adatoms on a W (100) surface is considered and the critical dynamics of the surface near the (1 × 1) → c (2 × 2) reconstruction transition is studied with a combination of analytic theory and Monte Carlo simulations.
2
Diffusion of Particles Adsorbed on a Reconstructive Surface
TL;DR: In this paper, the influence of surface reconstruction on diffusion of particles, adsorbed on the surface, is investigated in the framework of symmetrical four-position model and analytical expressions for the free energy and chemical and jump diffusion coefficients are obtained assuming the lateral interaction between the particles is negligibly small.
2
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Robert Gomer
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Chemisorption of Hydrogen on Tungsten (100)
Peder J. Estrup,J. Anderson +1 more
TL;DR: In this article, the interaction of hydrogen with a single-crystal tungsten (100) surface has been studied, using LEED in conjunction with flashdesorption and surface potential measurements.
230
A LEED study of structures produced by H2 on (100) W
K. Yonehara,Lanny D. Schmidt +1 more
TL;DR: In this paper, the LEED structures resulting from hydrogen adsorption on (100)W are studied as functions of hydrogen coverage and surface temperature for temperatures above 78 °K, and it is suggested that this structure on the clean surface may be due to structural rearrangement of tungsten or an adsorbed state of hydrogen which goes into solution upon heating.
172
Surface structures of W(110) and W(100) faces by the dynamical LEED approach
M. A. Van Hove,S. Y. Tong +1 more
TL;DR: In this article, the surface structures of W(110) and W(100) faces were examined by means of an efficient dynamical LEED method, and it was found that the W (110) surface maintains the bulk structure, despite the possibility for the top tungsten atoms to settle into sites of higher coordination number.
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