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arXiv · 2304.04215

Charge transport modulation by a redox supramolecular spin-filtering chiral crystal

Michael Verhage·Pantelis Bampoulis·Marco D. Preuss·Ivo Filot·Heiner Friedrich·Rick R. M. Joosten·E. W. Meijer·Kees Flipse
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Abstract

The chirality induced spin selectivity (CISS) effect is a fascinating phenomena correlating molecular structure with electron spin-polarisation in excited state measurements. Experimental procedures to quantify the spin-filtering magnitude relies generally on averaging data sets, especially those from magnetic field dependent conductive-AFM. We investigate the underlying observed disorder in the IV spectra and the origin of spikes superimposed. We demonstrate and explain that a dynamic, voltage sweep rate dependent, phenomena can give rise to complex IV curves for chiral crystals of coronene bisimide. The redox group, able to capture localized charge states, acts as an impurity state interfering with a continuum, giving rise to Fano resonances. We introduce a novel mechanism for the dynamic transport which might also provide insight into the role of spin-polarization. Crucially, interference between charge localisation and delocalisation during transport may be important properties into understanding the CISS phenomena.

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Michael Verhage, Pantelis Bampoulis, Marco D. Preuss, Ivo Filot, Heiner Friedrich, Rick R. M. Joosten, E. W. Meijer, Kees Flipse. 2023-04-09. Charge transport modulation by a redox supramolecular spin-filtering chiral crystal. https://arxiv.org/abs/2304.04215

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