Nano Archive

Spin-orbit interaction and anomalous spin relaxation in carbon nanotube quantum dots

Bulaev, Denis V. and Trauzettel, Bjoern and Loss, Daniel (2008) Spin-orbit interaction and anomalous spin relaxation in carbon nanotube quantum dots. PHYSICAL REVIEW B, 77 (23).

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Official URL: http://link.aps.org/doi/10.1103/PhysRevB.77.235301

Abstract

We study spin relaxation and decoherence in nanotube quantum dots caused by electron-lattice and spin-orbit interaction and predict striking effects induced by magnetic fields B. For particular values of B, destructive interference occurs resulting in ultralong spin relaxation times T-1 exceeding tens of seconds. For small phonon frequencies omega, we find a 1/root omega spin-phonon noise spectrum-a dissipation channel for spins in quantum dots-which can reduce T-1 by many orders of magnitude. We show that nanotubes exhibit zero-field level splitting caused by spin-orbit interaction. This enables an all-electrical and phase-coherent control of spin.

Item Type:Article
Subjects:Physical Science > Nanophysics
Material Science > Functional and hybrid materials
Physical Science > Nano objects
ID Code:544
Deposited By:IoN
Deposited On:20 Jan 2009 16:32
Last Modified:29 Jan 2009 14:47

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