How to Distinguish Dislocation Drag Processes from Thermal Activation

Abstract

Experiments are described which demonstrate the influence of viscosity on thermal activation. In addition experiments which delineate the magnetooscillations in the drag coefficient are detailed. The first set of experiments shows that the creep rate, after plastic deformation, exhibits a minimum and a maximum. This is explained by considering the temperature dependence of the electron drag in the superconducting state. The magnetooscillations allow a distinction to be made between an anharmonic drag mode and a flutter mode; the experiments show that a flutter mode is preferred for temperatures below 5 K. Es werden Experimente beschrieben, in denen der

Theory of electroplasticity based on electromagnetic induction

“…In the superconducting state, electron drag is quenched, and it appears only in the normal state. There is experimental evidence that screw dislocations experience a smaller electron drag force at a given speed than edge dislocations [39]. One source of electron drag is the atomic restructuring in the core as a dislocation glides, which generates electron-hole pairs in the vicinity of the Fermi energy, thereby dissipating energy.…”