A model for the reconstructions of the W(100) surface is presented. Four types of distortions are obtained, along 〈011〉, 〈001〉, 〈100〉 (commensurate), and (× 10) (incommensurate). The 〈011〉 distortion, corresponding to the observed (√2×√2)45° clean surface, is worked out in detail. A distortion magnitude of ∼ 0.35 Å is found, and a surface coherence length ξ≃15° Å close to experiment. The full vibrational spectrum, the distortion penetration, and the anisotropic surface anharmonic energies are also obtained.
Instability, Distortion and Dynamics of the W(100) Surface / A., Fasolino; Santoro, Giorgio; E., Tosatti. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 44:(1980), pp. 1684-1687. [10.1103/PhysRevLett.44.1684]
Instability, Distortion and Dynamics of the W(100) Surface
SANTORO, Giorgio;
1980
Abstract
A model for the reconstructions of the W(100) surface is presented. Four types of distortions are obtained, along 〈011〉, 〈001〉, 〈100〉 (commensurate), and (× 10) (incommensurate). The 〈011〉 distortion, corresponding to the observed (√2×√2)45° clean surface, is worked out in detail. A distortion magnitude of ∼ 0.35 Å is found, and a surface coherence length ξ≃15° Å close to experiment. The full vibrational spectrum, the distortion penetration, and the anisotropic surface anharmonic energies are also obtained.
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