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Issue 9, 2016
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Transformation of the coordination complex [Co(C3S5)2]2− from a molecular magnet to a potential qubit

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Abstract

Mononuclear transition metal complexes demonstrate significant potential in the divergent applications of spintronics and quantum information processing. The facile tunability of these complexes enables structure function correlations for a plethora of relevant magnetic quantities. We present a series of pseudotetrahedral [Co(C3S5)2]2− complexes with varying deviations from D2d symmetry to investigate the influence of structural distortions on spin relaxation dynamics and qubit viability, as tuned by the variable transverse magnetic anisotropy, E. To overcome the traditional challenge of measuring E in species where DE, we employed a different approach of harnessing ac magnetic susceptibility to probe the emergence of quantum tunneling of magnetization as a proxy for E. Across the range of values for E in the series, we observe magnetic hysteresis for the smallest value of E. The hysteresis disappears with increasing E, concomitant with the appearance of an observable, low frequency (L-band) electron paramagnetic resonance (EPR) signal, indicating the potential to controllably shift the molecule's utilization from classical to quantum information processing applications. The development of design principles for molecular magnet information processing requires separate design principles for classical versus quantum regimes. Here we show for the first time how subtle structural changes can switch the utility of a complex between these two types of applications.

Graphical abstract: Transformation of the coordination complex [Co(C3S5)2]2− from a molecular magnet to a potential qubit

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Publication details

The article was received on 16 May 2016, accepted on 09 Jun 2016 and first published on 21 Jun 2016


Article type: Edge Article
DOI: 10.1039/C6SC02170K
Citation: Chem. Sci., 2016,7, 6160-6166
  • Open access: Creative Commons BY-NC license
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    Transformation of the coordination complex [Co(C3S5)2]2− from a molecular magnet to a potential qubit

    M. S. Fataftah, S. C. Coste, B. Vlaisavljevich, J. M. Zadrozny and D. E. Freedman, Chem. Sci., 2016, 7, 6160
    DOI: 10.1039/C6SC02170K

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