To understand quantum mechanical transport in ferromagnetic semiconductor the knowledge of basic material properties like phase coherence length and corresponding dephasing mechanism are indispensable ingredients. The lack of observable quantum phenomena prevented experimental access to these quantities so far. Here we report about the observations of universal conductance fluctuations in ferromagnetic (Ga,Mn)As. The analysis of the length and temperature dependence of the fluctuations reveals a T^{-1} dependence of the dephasing time.
@article{arxiv.cond-mat/0603418,
title = {Dephasing in (Ga,Mn)As nanowires and rings},
author = {K. Wagner and D. Neumaier and M. Reinwald and W. Wegscheider and D. Weiss},
journal= {arXiv preprint arXiv:cond-mat/0603418},
year = {2009}
}