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 . For particular values of , destructive interference occurs resulting in ultralong spin relaxation times exceeding tens of seconds. For small phonon frequencies , we find a spin-phonon noise spectrum—a dissipation channel for spins in quantum dots—which can reduce 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.
5 More- Received 21 January 2008
DOI:https://doi.org/10.1103/PhysRevB.77.235301
©2008 American Physical Society