Conductance Fluctuations in Quantum Wires of n-CdTe and n-Cd1-xMnxTe |
| J. Jaroszyński, J. Wróbel, M. Sawicki, T. Skośkiewicz, G. Karczewski, T. Wojtowicz, J. Kossut, T. Dietl Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warszawa, Poland E. Kamińska, E. Papis, A. Barcz and A. Piotrowska Institute of Electron Technology, Al. Lotników 32/46, 02-668 Warszawa, Poland |
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| We present millikelvin studies of magnetoconductance in submicron wires of In-doped n+-CdTe and n+-Cd0.99Mn0.01Te epilayers. Weak-field magnetoresistance which arises from quantum localization as well as universal conductance fluctuations have been observed. The exchange coupling to magnetic impurities is shown to decrease the correlation field of the fluctuations. This novel effect is interpreted by invoking 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 spin-splitting of the electronic states. |
| DOI: 10.12693/APhysPolA.88.1000 PACS numbers: 72.15.Rn, 73.20.Fz, 73.61.Ga |