Abstract
We have calculated the transverse dc electrical conductivity of a quasi-two-dimensional quantum well in the presence of a magnetic field normal to the barriers of the well for electron–magnon interaction in dilute magnetic semiconductors. The electron gas is considered to be quasi-two-dimensional, while the magnons are considered to be bulk type. By using the formalism of linear response theory an expression for the transverse magnetoconductivity is explicitly calculated for a quasi two-dimensional electron gas confined to a square quantum-well-type structure interacting with three-dimensional magnons. We found that the magnetoconductivity develops an oscillation as the magnetic field is changed. Application was made for a Ga1–xMnxAs sample for which magnetic order occurs below 110 K for manganese concentration about 5%. (© 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
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