Macroscopic Quantum Coherence in a Magnetic Nanoparticle Above the Surface of a Superconductor

Details Macroscopic Quantum Coherence in a Magnetic Nanoparticle Above the Surface of a Superconductor Macroscopic Quantum Coherence in a Magnetic Nanoparticle Above the Surface of a Superconductor

2000-02-16

arxiv.org/abs/cond-mat/0002255v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

RevTeX, 4 pages, 1 figure. Submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.85.5206

We study macroscopic quantum tunneling of the magnetic moment in a
single-domain particle placed above the surface of a superconductor. Such a
setup allows one to manipulate the height of the energy barrier, preserving the
degeneracy of the ground state. The tunneling amplitude and the effect of the
dissipation in the superconductor are computed.

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