https://scholars.lib.ntu.edu.tw/handle/123456789/475240
標題: | Ultra-giant magnetoresistance in graphene-based spin valves with gate-controlled potential barriers | 作者: | Tseng, P WEN-JENG HSUEH |
關鍵字: | spintronics; giant magnetoresistance; graphene spin transport; spin valve; graphene nanoribbons | 公開日期: | 2019 | 出版社: | IOP PUBLISHING LTD | 卷: | 21 | 期: | 11 | 來源出版物: | New Journal of Physics | 摘要: | © 2019 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft. Pursuing larger tunnel magnetoresistance is a significant work to develop attractive spin-valve devices for high-performance read heads of hard disk drives, magnetic random access memories, and transistors. Here, we propose an ultra-giant magnetoresistance reaching higher than 40 000% at room temperature by using a spin valve of an armchair graphene nanoribbon with double gate-controlled potential barriers. The ultra-giant magnetoresistance approximately 60 times larger than that of traditional MgO-barrier spin valves is caused by an extraordinary current suppression in the antiparallel mode. Moreover, owing to the concept of the gate-voltage barrier, the proposed system provided not only lower complexity of the fabricating standard but also longer endurance of the operation than traditional spin-valve devices. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/475240 | ISSN: | 1367-2630 | DOI: | 10.1088/1367-2630/ab531f |
顯示於: | 工程科學及海洋工程學系 |
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