Dephasing in (Ga,Mn)As nanowires and rings

Details Dephasing in (Ga,Mn)As nanowires and rings Dephasing in (Ga,Mn)As nanowires and rings

2006-03-15

arxiv.org/abs/cond-mat/0603418v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.97.056803

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.

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