a Departamento de Investigación en Física, Universidad de Sonora, Apdo. Postal 5-88, C.P. 83190 Hermosillo, Sonora, Mexico b Departamento de Física, Universidad de Sonora, Apdo. Postal 1626, C.P. 83000 Hermosillo, Sonora, Mexico
Abstract:
The resonant tunneling of electrons through a magnetic quantum ring in a two-dimensional sample and the effect of this resonant tunneling on the conductivity of the sample are studied in this work. The ballistic conductance of the sample is calculated for several values of the ratio (inner radius)/(outer radius) of the ring. The limit of a conductance plateau is recovered for approximately equal radii and previous results for the conductance of a magnetic quantum dot are recovered in the case of an approximately zero inner radius.