Lecturer: Prof. Michael Wilkinson from the Open University
Abstract:
I shall give theoretical explanations of
two experimental observations of universal
behaviour in semiconductor systems.
The fist concerns the dependence of
photoconductivity $G$ upon light intensity $I$.
It is typically found that $G=I^\gamma$. Simple kinetic
theory indicates that we should expect
$\gamma=1$ or $\gamma=1/2$, but experimentally
values close to $\gamma =3/4$ or $\gamma=2/3$
are often observed, with $I$ varying over several decades.