The kinetics of the deformation increment stimulated by the superconducting transition in β-tin is investigated. Experiments are done on single crystals of high purity strained in the transient creep regime at a temperature of 1.6 K. It is found that the creep after the N–S transition occurs in stages, and the features of the strain-rate versus strain curves are analyzed within each stage. An interpretation of the experimental results is proposed, based on a kink mechanism for the motion of dislocations through the Peierls barriers with allowance for the influence of quantum fluctuations and electron drag on the nucleation of kinks.

Topics
Superconductivity, Quantum fluctuations
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2001
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