Starting from a multivalley model of a cubic semiconductor, a calculation of the effect of elastic strain on certain galvanomagnetic effects is carried out. It is found that the effects are sensitive to the strength of the intervalley scattering. An experiment on germanium to which the calculation is applicable is described. It is concluded from a comparison of the theory and the experiment that the coupling constant which characterizes the coupling of the electrons to the intervalley phonons in the model of Herring is considerably smaller than the coupling constant to the acoustic phonons.

• Received 26 April 1956

DOI:https://doi.org/10.1103/PhysRev.103.1240