Perfect spin-fillter and spin-valve in carbon atomic chains

Abstract

We report ab initio calculations of spin-dependent transport in single atomic carbon chains bridging two zigzag graphene nanoribbon electrodes. Our calculations show that carbon atomic chains coupled to graphene electrodes are perfect spin-filters with almost 100 % spin polarization. Moreover, carbon atomic chains can also show a very large bias-dependent magnetoresistance up to 1000000 % as perfect spin-valves. These two spin-related properties are independent on the length of carbon chains. Our report, the spin-filter and spin-valve are conserved in a single device simultaneously, opens a new way to the application of all-carbon composite spintronics.

3 pages, 3 figures

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• Synthesis, Characterization, and Modeling of Naphthyl-Terminated sp Carbon Chains: Dinaphthylpolyynes
• High performance current and spin diode of atomic carbon chain between transversely symmetric ribbon electrodes
• A tunable electronic beam splitter realized with crossed graphene nanoribbons
• Nanostructured graphene for spintronics
• Vibrational characterization of dinaphthylpolyynes: A model system for the study of end-capped sp carbon chains
• The role of temperature on defect diffusion and nanoscale patterning in graphene
• Highly tunable spin-dependent electron transport through carbon atomic chains connecting two zigzag graphene nanoribbons
• Effects of Geometry and Symmetry on Electron Transport through Graphene-Carbon-Chain Junctions
• Carbon sp chains in graphene nanoholes
• Long triple carbon chains formation by heat treatment of graphene nanoribbon: Molecular dynamics study with revised Brenner potential
• Vibrational properties of sp carbon atomic wires in cluster-assembled carbon films
• Odd-even phonon transport effects in strained carbon atomic chains bridging graphene nanoribbon electrodes
• Transformation of a graphene nanoribbon into a hybrid 1D nanoobject with alternating double chains and polycyclic regions
• The First-principles Study on the Mechanics, Optical and Phonon Properties of Carbon Chains
• Magnetism and Spin Transport of Carbon Chain between Armchair Graphene Nanoribbon electrodes
• Asymmetric Coulomb Oscillation and Giant Anisotropic Magnetoresistance in Doped Graphene Nanojunctions
• Thermal formation of carbynes
• Magnetic and electronic properties of 1D hybrid nanoobjects composed of alternating polycyclic hydrocarbon regions and double carbon chains
• Quasiperiodic magnetic chain as a spin filter for arbitrary spin states