The internal structure of plasmons

The concept of an internal wave function for the plasmon is introduced and discussed. Explicit results are presented for two and three dimensions in the degenerate and nondegenerate limit, respectively. The reciprocal Fermi wavevector Ksub(F)-1 and the thermal wavelength Ksub(T)-1 are found to define the length scale and hence the size of the plasmon. A possible surface anomaly is indicated. (orig.)