Landau-Zener tunneling of a single Tb3+ magnetic moment allowing the electronic read-out of a nuclear spin

Abstract

A multi-terminal device based on a carbon nanotube quantum dot was used at very low tem- perature to probe a single electronic and nuclear spin embedded in a bis-phthalocyanine Terbium (III) complex (TbPc2). A spin-valve signature with large conductance jumps was found when two molecules were strongly coupled to the nanotube. The application of a transverse field separated the magnetic signal of both molecules and enabled single-shot read-out of the Terbium nuclear spin. The Landau-Zener (LZ) quantum tunneling probability was studied as a function of field sweep rate, establishing a good agreement with the LZ equation and yielding the tunnel splitting Δ. It was found that ? increased linearly as a function of the transverse field. These studies are an essential prerequisite for the coherent manipulation of a single nuclear spin in TbPc2.

7 pages, 6 figures, to appear in PRB

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Cited by in corpus (11)

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• Quantum parameter estimation with the Landau-Zener transition
• Anisotropy-Exchange Resonance as a Mechanism for Entangled State Switching
• Non-perturbative Many-Body Treatment of Molecular Magnets
• Electronic control and switching of entangled spin state using anisotropy and exchange in the three-particle paradigm
• Nanoscale X-ray investigation of magnetic metallofullerene peapods
• Analytic approach to the Landau-Zener problem in bounded parameter space
• Using near-flat-band electrons for read-out of molecular spin qubit entangled states
• Few strongly interacting fermions of different mass driven in the vicinity of a critical point
• Transparency enhancement in a double-barrier structure by the Fano antiresonance
• Nature of hyperfine interactions in TbPc${}_2$ single-molecule magnets: Multireference ab-initio study