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
Department of Physics, University of Süleyman Demirel, 32260 Isparta, Turkey
Received June 10, 2019, revised July 30, 2019, published online October 25, 2019
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.