CVD Bilayer Graphene Spin Valves with 26 μm Spin Diffusion Length at Room Temperature
We present inverted spin-valve devices fabricated from chemical vapor deposition (CVD)-grown bilayer graphene (BLG) that show more than a doubling in device performance at room temperature compared to state-of-the-art bilayer graphene spin valves. This is made possible by a polydimethylsiloxane drop...
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| Veröffentlicht in: | Nano letters 2022-06, Vol.22 (12), p.4949-4955 |
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| container_issue | 12 |
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| container_title | Nano letters |
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| creator | Bisswanger, Timo Winter, Zachary Schmidt, Anne Volmer, Frank Watanabe, Kenji Taniguchi, Takashi Stampfer, Christoph Beschoten, Bernd |
| description | We present inverted spin-valve devices fabricated from chemical vapor deposition (CVD)-grown bilayer graphene (BLG) that show more than a doubling in device performance at room temperature compared to state-of-the-art bilayer graphene spin valves. This is made possible by a polydimethylsiloxane droplet-assisted full-dry transfer technique that compensates for previous process drawbacks in device fabrication. Gate dependent Hanle measurements reveal spin lifetimes of up to 5.8 ns and a spin diffusion length of up to 26 μm at room temperature combined with a charge carrier mobility of about 24 000 cm2(V s)−1 for the best device. Our results demonstrate that CVD-grown BLG shows equally good room temperature spin transport properties as both CVD-grown single-layer graphene and even exfoliated single-layer graphene. |
| doi_str_mv | 10.1021/acs.nanolett.2c01119 |
| format | Article |
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| title | CVD Bilayer Graphene Spin Valves with 26 μm Spin Diffusion Length at Room Temperature |
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