Detection of athermal plasticity of tin single crystals below 1° K
Г. І. КириченкоPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovV. V. PustovalovPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovV. P. SoldatovPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovS. É. ShumulinPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Kharkov
ABI
Annotatsiya
The temperature dependences of the critical shear stress τ0 and the sensitivity of the stress to the strain rate ∂τ/∂Inϵ have been studied over the temperature range from 0.5 to 4.4° K on single crystals of high-purity tin. We have found that below 1° K both τ0 and ∂τ/∂Inϵ do not depend on the temperature. Activation analysis has shown that the classical Arrhenius rate equation does not hold below 1° K. The results obtained are interpreted as a manifestation of quantum effects that occur in tin below 1° K.
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