Toward spin-based Magneto Logic Gate in Graphene

ORAL

Abstract

Graphene has emerged as a leading candidate for spintronic applications due to its long spin diffusion length at room temperature. A universal magnetologic gate (MLG) based on spin transport in graphene has been recently proposed as the building block of a logic circuit which could replace the current CMOS technology. This MLG has five ferromagnetic electrodes contacting a graphene channel and can be considered as two three-terminal XOR logic gates. Here we demonstrate this XOR logic gate operation in such a device. This was achieved by systematically tuning the injection current bias to balance the spin polarization efficiency of the two inputs, and offset voltage in the detection circuit to obtain binary outputs. The output is a current which corresponds to different logic states: zero current is logic `0', and nonzero current is logic `1'. We find improved performance could be achieved by reducing device size and optimizing the contacts.

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Authors

  • Hua Wen

    Dept of Physics and Astronomy, Univ. of California, Riverside

  • Hanan Dery

    Dept. of Electrical and Computer Engineering, University of Rochester

  • Walid Amamou

    UC Riverside, Dept. of Physics and Astronomy, University of California, Riverside

  • Tiancong Zhu

    Dept. of Physics, The Ohio State University

  • Zhisheng Lin

    Deptt. of Physics and Astronomy, University of California, Riverside

  • Jing Shi

    UCR, UC Riverside, Dept. of Physics and Astronomy, University of California, Riverside

  • Igor Zutic

    University at Buffalo, State University of New York at Buffalo, SUNY at Buffalo, Dept. of Physics, University at Buffalo, State University of New York, University at Buffalo - SUNY, SUNY Buffalo

  • Ilya Krivorotov

    Dept. of Physics and Astronomy, University of California, Irvine, Univ of California - Irvine

  • Lu Sham

    Dept. of Physics, University of California, San Diego, Dept of Physics, University of California San Diego

  • Roland Kawakami

    Dept. of Physics, The Ohio State University