title: Strong spin-phonon coupling between a single-molecule magnet and a carbon nanotube nanoelectromechanical system.
abstract: Magnetic relaxation processes were first discussed for a crystal of paramagnetic transition ions. It was suggested that mechanical vibrations of the crystal lattice (phonons) modulate the crystal electric field of the magnetic ion, thus inducing a 'direct' relaxation between two different spin states. Direct relaxation has also been predicted for single-molecule magnets with a large spin and a high magnetic anisotropy and was first demonstrated in a Mn12 acetate crystal. The spin-lattice relaxation time for such a direct transition is limited by the phonon density of states at the spin resonance. In a three-dimensional system, such as a single-molecule magnet crystal, the phonon energy spectrum is continuous, but in a one-dimensional system, like a suspended carbon nanotube, the spectrum is discrete and can be engineered to an extremely low density of states. An individual single-molecule magnet, coupled to a suspended carbon nanotube, should therefore exhibit extremely long relaxation times and the system's reduced size should result in a strong spin-phonon coupling. Here, we provide the first experimental evidence for a strong spin-phonon coupling between a single molecule spin and a carbon nanotube resonator, ultimately enabling coherent spin manipulation and quantum entanglement.
authors: Institut Néel, CNRS et Université Joseph Fourier, BP 166, F-38042 Grenoble Cedex 9, France.
authors: Marc
authors: M
authors: Ganzhorn
authors: Svetlana
authors: S
authors: Klyatskaya
authors: Mario
authors: M
authors: Ruben
authors: Wolfgang
authors: W
authors: Wernsdorfer
mesh_terms: D004574:Electromagnetic Fields; D006801:Humans; D007477:Ions / Q000737:chemistry*; D008280:Magnetics; D036103:Nanotechnology / Q000639:trends*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D060739:Phonons
chemical_list: D007477:Ions; D037742:Nanotubes, Carbon
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