Fizika Nizkikh Temperatur: Volume 45, Number 12 (December 2019), p. 1480-1484    ( to contents , go back )

Magnetoresistance of electrons in diluted magnetic semiconductor Volcano ring

A.M. Babanl─▒

Department of Physics, University of S├╝leyman Demirel, 32260 Isparta, Turkey
E-mail: arifbabanli@sdu.edu.tr

Received June 10, 2019, revised July 30, 2019, published online October 25, 2019

Abstract

The influence of exchange interaction on the transport properties of a two-dimensional diluted magnetic sem-iconductor quantum ring with finite width has been investigated in the presence of a uniform perpendicular magnetic field. The dependence of magnetoresistance on the magnetic field, Mn concentration, and quantum ring width are investigated. In the absence of exchange interaction, a typical beating pattern with well-defined node-positions in the oscillating magnetoresistance is observed. It was shown that in the present exchange interactions the beating pattern is destroyed.

Key words: diluted magnetic semiconductor, magnetoresistance, ballistic conductance.

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