Hall Effect in Oriented Single Crystals ofn-Type Germanium

Hall measurements have been made on oriented single crystals of $n$-type germanium confirming the variations of the Hall coefficient with the direction and magnitude of the magnetic field, and with the direction of the current, which are predicted by theories based on the eight-ellipsoid model. Although other assumptions must be made to secure exact agreement, these measurements, when made under suitable conditions, can be explained by a theory assuming an energy-independent scattering time $\tau$. This type of measurement may be useful in determining symmetry properties of the energy surfaces near a band edge in other semiconductors.