Heitler-London Approach to Electrical Conductivity, II. A Proof of the Hopping Motion

Abstract

A foundation of the Heitler-London approach to electrical conductivity is given, which has been left unproved in the previous paper (J. Phys. Soc. Japan 15 (1960) 802), applying Van Hove’s method. The hopping motion of electron is realized under the conditions: large effective mass, strong interaction with lattice and the presence of a potential fluctuation through lattice.