Noise spectra were measured on CBE grown InP samples in the frequency
range from 1 Hz to 10(4) kHz at temperatures from 77 to 500 K. The exp
erimental results show that 1/f noise stems from the lattice scatterin
g. The 1/f noise in InP is well characterised by a parameter alpha(Lat
t) in this temperature range. The temperature dependence of alpha(Latt
) was determined experimentally. Assuming that the number of phonons i
n a mode fluctuates with a 1/f spectrum, we are able to derive a theor
etical expression for alpha(Latt) in terms of the contributions by the
acoustic phonons and the polar optical phonons. At low temperatures (
< 200 K), the temperature dependence of alpha(Latt) can be analysed by
this model with two kinds of phonons. However, at temperatures above
200 K, the model does not lead to satisfactory results. (C) 1997 Elsev
ier Science Ltd.