Mesoscopic phenomena in nanostructures that incorporate semimagnetic semiconductors (diluted magnetic semiconductors) may exhibit a number of novel features driven by the s-d spin-exchange interaction. The influence of this interaction upon quantum interference effects, such as universal conductance fluctuations, low-frequency noise and quantum localization, is described. Results of recent millikelvin magnetoconductivity measurements, carried out for microstructures of Hg1-x-yCdyMnxTe bicrystals and for submicron wires of MBE grown Cd1-xMnxTe:In epilayers, are presented. Particular attention is paid to a new driving mechanism of the magnetoconductance fluctuations -- the redistribution of the electrons between energy levels of the system, induced by the giant s-d exchange spin- splitting.
Tomasz Dietl, Tomasz Dietl,
"Mesoscopic phenomena in semimagnetic semiconductors", Proc. SPIE 2780, Metal/Nonmetal Microsystems: Physics, Technology, and Applications, (8 April 1996); doi: 10.1117/12.238150; https://doi.org/10.1117/12.238150