Quantum Theory of Dislocation Motion in Metals

概要

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A new theory of dislocation motion through the Peierls field in metals is described. First, quantized vibrations of the lattice containing a dislocation have been considered. Then, the quantum theory of resonance-type transfer of dislocations has been worked out for two cases ; electrons have no effect on the transfer in one case, and the nonadiabatic interaction of electrons with dislocations decreases the probability of the transfer in the other. Quantitative agreements have been obtained between theory and experiment on the dislocation velocity vs. applied shear stress, the yield stress vs. temperature in copper, and the anomalous yield stress at low temperatures below 50 K of Cu-Al dilute alloys. The present theory applied to the loss of the strength of superconducting metals has succeeded in explaining the experimentally observed temperature dependence of this phenomenon in lead.
社団法人日本物理学会の論文
1995-08-15