Abstract—Quantum interference effects in quantum rings provide suitable means for controlling spin at mesoscopic scales. So an open one-dimensional quantum nano ring containing a potential impurity which is subjected to the Rashba spin-orbit interaction is considered. The strength of Rashba parameter can be controlled by a normal electric field. The quantum ring coupled with three leads (one input and two output leads) and patterned in two-dimensional electron gases (2EDG). One dimensional quantum wave guide theory, transfer matrix and Griffith’s boundary conditions is used to calculated the transmission coefficients. Spin rotation and conductance of this arm-depended quantum ring is studied. We investigated that the position of impurity and the output leads can be effect on the conductance and spin rotation. We introduce the mesoscopic structure as a spin rotator of electrons.

Index Terms—Spintronic, Three-terminal quantum ring, Rashba spin-orbit interaction.

Fatemeh Azadi Chegeni and Edris Faizabadi are with Department of physics, Iran university of Science and Technology, 16846 Tehran, Iran. (E-mail:azadif2@gmail.com ；edris@iust.ac.ir).

Cite: F. Azadi Chegeni and E. Faizabadi, "Quantum Conductance of Three-Terminal Nanoring in the Presence of Rashba Interaction and an Impurity ," International Journal of Applied Physics and Mathematics  vol. 1, no. 3, pp. 155-160, 2011.