Uniform Motion of a Screw Dislocation in a Lattice

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概要

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• Uniform motion of a screw dislocation is studied in a cubic lattice in which atoms interact piecewise harmonically with nearest neighbours. The stress σ required or keeping the motion with velocity ν is given exactly. The dislocation excites lattice waves with k given by ω(k)=ν・k, where ω(k)is the dispersion relation of waves and k is not restricted within the first Brillouin zone. In contrast to continuum approximation, there is no singularity at ν=c; c is the sound velocity. At low velocities (ν<__∼c/3),σ(ν) has many singular points reflecting the van Hove singularities.

• 社団法人日本物理学会の論文
• 1971-02-05

著者

• Ishioka Shunya

  Departmnet Of Physics Faculty Of Science University Of Tokyo

• Ishioka Shunya

  Department Of Information Science Kanagawa University

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• A Theory of the Peierls Stress of a Screw Dislocation. II
• Dislocation Vibration : Effective Mass and Line Tension
• A Theory of the Peierls Stress of a Screw Dislocation. I
• Uniform Motion of a Screw Dislocation in a Lattice
• Steady Motion of a Dislocation in a Lattice

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