Twisted molecular wires polarize spin currents at room temperature

Chih-Hung Ko, Qirong Zhu, Francesco Tassinari, George Bullard, Peng Zhang, David N Beratan, Ron Naaman, Michael J Therien

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

A critical spintronics challenge is to develop molecular wires that render efficiently spin-polarized currents. Interplanar torsional twisting, driven by chiral binucleating ligands in highly conjugated molecular wires, gives rise to large near-infrared rotational strengths. The large scalar product of the electric and magnetic dipole transition moments ([Formula: see text]), which are evident in the low-energy absorptive manifolds of these wires, makes possible enhanced chirality-induced spin selectivity-derived spin polarization. Magnetic-conductive atomic force microscopy experiments and spin-Hall devices demonstrate that these designs point the way to achieve high spin selectivity and large-magnitude spin currents in chiral materials.
Original languageEnglish
Article numbere2116180119
Number of pages7
JournalProceedings of the National Academy of Sciences of the United States of America
Volume119
Issue number6
DOIs
Publication statusPublished - 8 Feb 2022

Funding

C.-H.K., G.B., P.Z., D.N.B. and M.J.T. acknowledge the Center for Synthesizing Quantum Coherence, supported through the NSF (CHE-1925690), for funding this research. Q.Z., F.T., and R.N. acknowledge the Binational Science Foundation-NSF through grant no. 2015689 and the Minerva Foundation for research support. C.-H.K. is grateful to Duke University for a Graduate Program Nano-science Fellowship, and G. B. gratefully acknowledges the Fitzpatrick Institute of Photonics at Duke University for a John T. Chambers Scholars Award. M.J.T. is indebted to the John Simon Guggenheim Memorial Foundation for a research fellowship. Publisher Copyright: © This article is distributed under Creative Commons Attribution-NonCommercialNoDerivatives License 4.0 (CC BY-NC-ND).

All Science Journal Classification (ASJC) codes

  • General

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