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Highly Efficient and Tunable Filtering of Electrons' Spin by Supramolecular Chirality of Nanofiber‐Based Materials
Author(s) -
Kulkarni Chidambar,
Mondal Amit Kumar,
Das Tapan Kumar,
Grinbom Gal,
Tassinari Francesco,
Mabesoone Mathijs F. J.,
Meijer E. W.,
Naaman Ron
Publication year - 2020
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201904965
Subject(s) - spintronics , materials science , chirality (physics) , supramolecular chemistry , enantiopure drug , nanofiber , nanotechnology , spins , spin (aerodynamics) , molecule , condensed matter physics , ferromagnetism , organic chemistry , chemistry , chiral symmetry breaking , physics , quantum mechanics , enantioselective synthesis , quark , nambu–jona lasinio model , catalysis , aerospace engineering , engineering
Abstract Organic semiconductors and organic–inorganic hybrids are promising materials for spintronic‐based memory devices. Recently, an alternative route to organic spintronic based on chiral‐induced spin selectivity (CISS) is suggested. In the CISS effect, the chirality of the molecular system itself acts as a spin filter, thus avoiding the use of magnets for spin injection. Here, spin filtering in excess of 85% in helical π‐conjugated materials based on supramolecular nanofibers at room temperature is reported. The high spin‐filtering efficiency can even be observed in nanofibers assembled from mixtures of chiral and achiral molecules through chiral amplification effect. Furthermore and most excitingly, it is shown that both “up” and “down” orientations of filtered spins can be obtained in a single enantiopure system via the temperature‐dependent helicity ( P and M ) inversion of supramolecular nanofibers. The findings showcase that materials based on helical noncovalently assembled systems are modular platforms with an emerging structure–property relationship for spintronic applications.