Chirality-Induced Spin Selectivity in Composite Materials: A Device Perspective
Metadatos
Afficher la notice complèteAuteur
Firouzeh, Seyedamin; Hossain, Md. Anik; Cuerva Carvajal, Juan Manuel; Álvarez de Cienfuegos, Luis; Pramanik, SandipanEditorial
ACS Publications
Date
2024-04-30Referencia bibliográfica
Firouzeh, S. et al. Acc. Chem. Res. 2024, 57, 1478−1487. [https://doi.org/10.1021/acs.accounts.4c00077]
Patrocinador
PID2020-118498GBI00 and PID2020-113059GB-C21; Natural Resources Canada (Project RES0064735); New Frontiers in Research Fund − Exploration (Project NFRFE- 2019-01298); Natural Sciences and Engineering Research Council (NSERC) Canada (Project RGPIN-2018-05127); Funding for open access charge: Universidad de Granada / CBUA.Résumé
CONSPECTUS: Magnetism is an area of immense fundamental and technological importance.
At the atomic level, magnetism originates from electron “spin”. The field of nanospintronics (or
nanoscale spin-based electronics) aims to control spins in nanoscale systems, which has
resulted in astronomical improvement in data storage and magnetic field sensing technologies
over the past few decades, recognized by the 2007 Nobel Prize in Physics. Spins in nanoscale
solid-state devices can also act as quantum bits or qubits for emerging quantum technologies,
such as quantum computing and quantum sensing.
Due to the fundamental connection between magnetism and spins, ferromagnets play a key
role in many solid-state spintronic devices. This is because at the Fermi level, electron density
of states is spin-polarized, which permits ferromagnets to act as electrical injectors and
detectors of spins. Ferromagnets, however, have limitations in terms of low spin polarization at
the Fermi level, stray magnetic fields, crosstalk, and thermal instability at the nanoscale.
Therefore, new physics and new materials are needed to propel spintronic and quantum device
technologies to the true atomic limit. Emerging new phenomena such as chirality induced spin selectivity or CISS, in which an
intriguing correlation between carrier spin and medium chirality is observed, could therefore be instrumental in nanospintronics.
This effect could allow molecular-scale, chirality controlled spin injection and detection without the need for any ferromagnet, thus
opening a fundamentally new direction for device spintronics.
While CISS finds a myriad of applications in diverse areas such as chiral separation, recognition, detection, and asymmetric catalysis,
in this focused Account, we exclusively review spintronic device results of this effect due to its immense potential for future
spintronics. The first generation of CISS-based spintronic devices have primarily used chiral bioorganic molecules; however, many
practical limitations of these materials have also been identified. Therefore, our discussion revolves around the family of chiral
composite materials, which may emerge as an ideal platform for CISS due to their ability to assimilate various desirable material
properties on a single platform. This class of materials has been extensively studied by the organic chemistry community in the past
decades, and we discuss the various chirality transfer mechanisms that have been identified, which play a central role in CISS. Next,
we discuss CISS device studies performed on some of these chiral composite materials. Emphasis is given to the family of chiral
organic-carbon allotrope composites, which have been extensively studied by the authors of this Account over the past several years.
Interestingly, due to the presence of multiple materials, CISS signals from hybrid chiral systems sometimes differ from those
observed in purely chiral systems. Given the sheer diversity of chiral composite materials, CISS device studies so far have been
limited to only a few varieties, and this Account is expected to draw increased attention to the family of chiral composites and
motivate further studies of their CISS applications.