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Two-Dimensional Flexible High Diffusive Spin Circuits
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DOI：10.1021/acs.nanolett.8b03520.png)
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摘要
En 中文
Owing to their unprecedented electronic properties, graphene and two-dimensional (2D) crystals have brought fresh opportunities for advances in planar spintronic devices. Graphene is an ideal medium for spin transport while being an exceptionally resilient material for flexible nanoelectronics. However, these extraordinary traits have never been combined to create flexible graphene spin circuits. Realizing such circuits could lead to bendable strain spin sensors, as well as a unique platform to explore pure spin current based operations and low-power 2D flexible nano electronics. Here, we demonstrate graphene spin circuits on flexible substrates for the first time. Despite the rough topography of the flexible substrates, these circuits prepared with chemical vapor deposited monolayer graphene reveal an efficient room temperature spin transport with distinctively large spin diffusion coefficients similar to 0.2 m(2) s(-1). Compared to earlier graphene devices on Si/SiO2 substrates, such values are up to 20 times larger, leading to one order higher spin signals and an enhanced spin diffusion length similar to 10 mu m in graphene-based nonlocal spin valves fabricated using industry standard systems. This high performance arising out of a characteristic substrate terrain shows promise of a scalable and flexible platform towards flexible 2D spintronics. Our innovation is a key step for the exploration of strain-dependent 2D spin phenomena and paves the way for flexible graphene spin memory logic units and planar spin sensors.
Keyword:
Flexible graphene spin circuits
flexible graphene spintronics
spin transport in graphene
two-dimensional spintronics
bendable nanoelectronics
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