Rotational States of Magnetic Molecules

Abstract

We study a magnetic molecule that exhibits spin tunneling and is free to rotate about its anisotropy axis. Exact low-energy eigenstates of the molecule that are superpositions of spin and rotational states are obtained. We show that parameter $\alpha =2(\hslash S{)}^2/(I\Delta )$ determines the ground state of the molecule. Here $\hslash S$ is the spin, $I$ is the moment of inertia, and $\Delta$ is the tunnel splitting. The magnetic moment of the molecule is zero at $\alpha <{\alpha }_c=[1-1/(2S{)}^2{]}^{-1}$ and non-zero at $\alpha >{\alpha }_c$. At $\alpha \to \infty$ the spin of the molecule localizes in one of the directions along the anisotropy axis.

4 pages, 3 figures

References in corpus (3)

• First-principles study of electron transport through the single-molecule magnet Mn12
• Fabrication of Nano-Gapped Single-Electron Transistors for Transport Studies of Individual Single-Molecule Magnets
• Universal Decoherence in Solids

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