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Room temperature manipulation of long lifetime spins in metallic-like carbon nanospheres

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  • Bálint Náfrádi

    (Laboratory of Physics of Complex Matter (LPMC), Ecole Polytechnique Fédérale de Lausanne)

  • Mohammad Choucair

    (School of Chemistry, University of Sydney)

  • Klaus-Peter Dinse

    (Institut für Experimentalphysik, Freie Universität Berlin)

  • László Forró

    (Laboratory of Physics of Complex Matter (LPMC), Ecole Polytechnique Fédérale de Lausanne)

Abstract

The time-window for processing electron spin information (spintronics) in solid-state quantum electronic devices is determined by the spin–lattice and spin–spin relaxation times of electrons. Minimizing the effects of spin–orbit coupling and the local magnetic contributions of neighbouring atoms on spin–lattice and spin–spin relaxation times at room temperature remain substantial challenges to practical spintronics. Here we report conduction electron spin–lattice and spin–spin relaxation times of 175 ns at 300 K in 37±7 nm carbon spheres, which is remarkably long for any conducting solid-state material of comparable size. Following the observation of spin polarization by electron spin resonance, we control the quantum state of the electron spin by applying short bursts of an oscillating magnetic field and observe coherent oscillations of the spin state. These results demonstrate the feasibility of operating electron spins in conducting carbon nanospheres as quantum bits at room temperature.

Suggested Citation

  • Bálint Náfrádi & Mohammad Choucair & Klaus-Peter Dinse & László Forró, 2016. "Room temperature manipulation of long lifetime spins in metallic-like carbon nanospheres," Nature Communications, Nature, vol. 7(1), pages 1-8, November.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms12232
    DOI: 10.1038/ncomms12232
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    Cited by:

    1. Jia-Shiang Chen & Kasidet Jing Trerayapiwat & Lei Sun & Matthew D. Krzyaniak & Michael R. Wasielewski & Tijana Rajh & Sahar Sharifzadeh & Xuedan Ma, 2023. "Long-lived electronic spin qubits in single-walled carbon nanotubes," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    2. Hyungsoo Lee & Chan Uk Lee & Juwon Yun & Chang-Seop Jeong & Wooyong Jeong & Jaehyun Son & Young Sun Park & Subin Moon & Soobin Lee & Jun Hwan Kim & Jooho Moon, 2024. "A dual spin-controlled chiral two-/three-dimensional perovskite artificial leaf for efficient overall photoelectrochemical water splitting," Nature Communications, Nature, vol. 15(1), pages 1-15, December.

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