Diffusion Coefficient of Heavy Particles in Metals —Calculation Based on Kubo Formula—

抄録

Diffusion coefficient of heavy particles in metals is calculated based on Kubo formula, by taking into account the interaction with conduction electrons. By a careful treatment of the thermodynamic limit we obtain the same expression for the coefficient as that derived by Kagan-Klinger method. Through the derivation we can see that though interaction between heavy particles and conduction electrons seems to be enhanced by a vertex renormalization, this enhancement is canceled by the wave-function renormalization. Thus, only the velocity of heavy particles is renormalized by a screening effect.