AI Article Synopsis
- Researchers discovered significant quantum tunnelling splitting in the lowest electronic spin levels of mononuclear nickel complexes, indicated by a "clock transition" observed through heat capacity experiments.
- This transition reduces spin-spin interactions between molecules, unlike a cobalt derivative where tunnelling is blocked by symmetry.
- The quantum tunnelling splitting can be chemically adjusted by altering the ligand shell, which influences crystal fields and magnetic properties—key factors for developing stable spin qubits for future quantum computing applications.*
Article 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 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.
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8179637 | PMC |
| http://dx.doi.org/10.1039/d0sc05856d | DOI Listing |
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