2017/01/01 by Kazi M. Alam, K. M. Alam, Sandipan Pramanik · 2 citations
Computer Science · Materials Science · Physics and Astronomy · #Carbon Nanotubes in Composites #Carbon fibers #Carbon nanotube #Composite material #Composite number #Condensed matter physics #Graphene research and applications #Materials science #Nanotechnology #Physics #Quantum-Dot Cellular Automata #Spin (aerodynamics) #Thermodynamics #cond-mat.mes-hall
paper · pdf · doi:10.1039/c6nr09395g
published as Nanoscale, 2017, 9, 5155-5163
openalex publication_date 2017/01/01 · arxiv created 2017/10/25 · arxiv updated 2017/10/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Spin filtering is an essential operation in spintronics that allows the creation and detection of spin polarized carriers. Transition metal ferromagnets are used as spin filters in most cases, though their spin filtering efficiency is only around ∼50%, thereby limiting the efficiency of spintronic devices. Recently, chiral systems such as DNA have been shown to exhibit efficient spin filtering, a phenomenon often dubbed as “chirality induced spin selectivity” (CISS). In this work, we consider single wall carbon nanotubes helically wrapped with single stranded poly-T DNA. By magnetoresistance measurements we show that this system exhibits significant spin polarization of ∼80%, which could be attributed to the Rashba spin–orbit interaction induced by the inversion-asymmetric helical potential of the DNA. The observed spin polarization is larger than that reported before for d(GT)15 strands. Such systems allow tailoring of spin polarization by chemical means and also allow extremely localized creation and detection of spin polarization without any magnetic element and could lead to extreme miniaturization and compact integration of spintronic devices and circuits.