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Spin-Orbit Coupling and Tunneling Current in a Parabolic Quantum Dot

Research paper by Hong-Yi Chen, Vadim Apalkov, Tapash Chakraborty

Indexed on: 19 Jun '06Published on: 19 Jun '06Published in: Physics - Mesoscopic Systems and Quantum Hall Effect



Abstract

We propose a novel approach to explore the properties of a quantum dot in the presence of the spin-orbit interaction and in a tilted magnetic field. The spin-orbit coupling within the quantum dot manifest itself as anti-crossing of the energy levels when the tilt angle is varied. The anti-crossing gap has a non-monotonic dependence on the magnitude of the magnetic field and exhibits a peak at some finite values of the magnetic field. From the dependence of the tunneling current through the quantum dot on the bias voltage and the tilt angle, the anti-crossing gap and most importantly the spin-orbit strength can be uniquely determined.