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Issue 14, 2021
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Chemical tuning of spin clock transitions in molecular monomers based on nuclear spin-free Ni(ii)

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Abstract

We report the existence of a sizeable quantum tunnelling splitting between the two lowest electronic spin levels of mononuclear Ni complexes. The level anti-crossing, or magnetic “clock transition”, associated with this gap has been directly monitored by heat capacity experiments. The comparison of these results with those obtained for a Co derivative, for which tunnelling is forbidden by symmetry, shows that the clock transition leads to an effective suppression of intermolecular spin–spin interactions. In addition, we show that the quantum tunnelling splitting admits a chemical tuning via the modification of the ligand shell that determines the crystal field and the magnetic anisotropy. These properties are crucial to realize model spin qubits that combine the necessary resilience against decoherence, a proper interfacing with other qubits and with the control circuitry and the ability to initialize them by cooling.

Graphical abstract: Chemical tuning of spin clock transitions in molecular monomers based on nuclear spin-free Ni(ii)

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Supplementary files

Article information


Submitted
23 Oct 2020
Accepted
20 Feb 2021
First published
25 Feb 2021

This article is Open Access
All publication charges for this article have been paid for by the Royal Society of Chemistry

Chem. Sci., 2021,12, 5123-5133
Article type
Edge Article

Chemical tuning of spin clock transitions in molecular monomers based on nuclear spin-free Ni(II)

M. Rubín-Osanz, F. Lambert, F. Shao, E. Rivière, R. Guillot, N. Suaud, N. Guihéry, D. Zueco, A. Barra, T. Mallah and F. Luis, Chem. Sci., 2021, 12, 5123
DOI: 10.1039/D0SC05856D

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