NOTE ON THE MOTION OF ELECTRONS AND HOLES IN PERTURBED LATTICES
R. R. Haering · Canadian Journal of Physics · 1959
A new set of orthogonal, localized functions is discussed. The functions bear the same relation to the functions of Luttinger and Kohn as the Wannier functions bear to the Bloch functions. The new functions are used to give an alternative derivation of the effective mass equation.