AI Article Synopsis
- Chiral-induced spin selectivity (CISS) is the phenomenon where the chirality of a medium influences the transport of electron spins, allowing one spin state to dominate over another.
- The study presents a new system using chiral 2D-layered Pb-iodide organic/inorganic hybrid perovskites that show efficient CISS, overcoming the limitations of previous monolayer structures.
- Experimental results demonstrate a high spin-polarization transport of 86%, showing that electron movement through the films is affected by both the magnetic state of the probe and the chiral nature of the molecules, as confirmed by magnetoresistance tests in modified spin-valve devices.
Article Abstract
Chiral-induced spin selectivity (CISS) occurs when the chirality of the transporting medium selects one of the two spin ½ states to transport through the media while blocking the other. Monolayers of chiral organic molecules demonstrate CISS but are limited in their efficiency and utility by the requirement of a monolayer to preserve the spin selectivity. We demonstrate CISS in a system that integrates an inorganic framework with a chiral organic sublattice inducing chirality to the hybrid system. Using magnetic conductive-probe atomic force microscopy, we find that oriented chiral 2D-layered Pb-iodide organic/inorganic hybrid perovskite systems exhibit CISS. Electron transport through the perovskite films depends on the magnetization of the probe tip and the handedness of the chiral molecule. The films achieve a highest spin-polarization transport of up to 86%. Magnetoresistance studies in modified spin-valve devices having only one ferromagnet electrode confirm the occurrence of spin-dependent charge transport through the organic/inorganic layers.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6897542 | PMC |
| http://dx.doi.org/10.1126/sciadv.aay0571 | DOI Listing |
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