Macrospin Tunneling and Magnetopolaritons with Nanomechanical Interference

Details Macrospin Tunneling and Magnetopolaritons with Nanomechanical Interference Macrospin Tunneling and Magnetopolaritons with Nanomechanical Interference

2010-11-10

arxiv.org/abs/1011.2242v2

Phys. Rev. Lett. 106, 147203 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4.4 pages, 3 figures. Slightly revised presentation, results unchanged

Scientific paper

10.1103/PhysRevLett.106.147203

We theoretically address the quantum dynamics of a nanomechanical resonator coupled to the macrospin of a magnetic nanoparticle by both instanton and perturbative approaches. We demonstrate suppression of the tunneling between opposite magnetizations by nanomechanical interference. By approximating the macrospin as a two-level system, we describe magnetopolaritons and their destruction by interference. The predictions can be verified experimentally by a molecular magnet attached to a nanomechanical bridge.

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