Magneto-transport in a mesoscopic ring with Rashba and Dresselhaus spin-orbit interactions

Santanu K. Maiti, Moumita Dey, Shreekantha Sil, Arunava Chakrabarti, S. N. Karmakar

Published 2011-03-02, updated 2011-07-23Version 2

Electronic transport in a one-dimensional mesoscopic ring threaded by a magnetic flux is studied in presence of Rashba and Dresselhaus spin-orbit interactions. A completely analytical technique within a tight-binding formalism unveils the spin-split bands in presence of the spin-orbit interactions and leads to a method of determining the strength of the Dresselhaus interaction. In addition to this, the persistent currents for ordered and disordered rings have been investigated numerically. It is observed that, the presence of the spin-orbit interaction, in general, leads to an enhanced amplitude of the persistent current. Numerical results corroborate the respective analytical findings.