SPIN ELECTRONICS: Spintronics in Y-junction carbon nanotubes
自旋电子学:Y 结碳纳米管中的自旋电子学
基本信息
- 批准号:0223943
- 负责人:
- 金额:$ 30万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:2002
- 资助国家:美国
- 起止时间:2002-10-01 至 2006-09-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
This proposal was received in response to the Spin Electronics for the 21st Century Initiative, Program Solicitation NSF 02-036. The proposal focuses on spin dependent transport and spintronics functionality in a unique nanostructured system - Y-junction Carbon Nanotubes.The Y-junction nanotubes, first fabricated by one of the PIs (JMX)-combine the attractive properties of carbon nanotubes (effectively 1D electronic transport with long ballistic mean free paths and exceptionally high current densities)with a three-terminal geometry and a built-in heterojunction barrier at the Y-branching point. Spin transport in ordinary, straight ferromagnetically contacted multi-walled carbon nanotubes, first studied by another of the PIs, has yielded excellent spin-polarized injection efficiencies and long spin-scattering lengths on the order of 0.25 um, making ferromagnet-nanotube hybrids a promising spintronics platform. The spin transport in a Y-junction with the built-in heterobarrier is already interesting and unexplored. But what makes the proposed devices unique is the possibility applying both ferromagnetic and normal metal contacts to the three terminals of the Y-junction, as well as using different ferromagnetic materials (with separately switchable magnetizations)for contacts to the same device. This unprecedented flexibility will enable us, for example, to clearly distinguish spin-mediated injection and extraction of currents from ordinary injection, tune the transmission of spin up and spin down electrons by means of a control voltage on the third terminal, witch the spin-coherent current from one Y-junction arm to another by switching the magnetization with an external field, and more generally produce a true three-terminal spintronic transistor. However great the potential of this new nanostructured system may be, a great amount of challenging work, from fabrication of the Y-junction nanotubes to fabrication of nano-scale contacts to cryogenic measurements of the contacted Y-junctions in the presence of magnetic fields externally modulated, will have to done first to prove the concepts. This NSF project is launched for these proof-of-concept explorations, and for paving the pathway to this new and exciting field of opportunities.
该提案是响应21世纪世纪自旋电子学倡议,计划征集NSF 02-036而收到的。 该提案的重点是在一个独特的纳米结构系统-Y-结碳纳米管中的自旋相关传输和自旋电子学功能。Y-结纳米管,首先制造的PI之一(JMX)-联合收割机结合了碳纳米管的吸引人的特性(具有长弹道平均自由路径和异常高的电流密度的有效的1D电子传输),具有三端几何形状和在Y-分支点自旋输运在普通的,直的铁磁接触的多壁碳纳米管,第一次研究的另一个PI,已经产生了良好的自旋极化注入效率和长的自旋散射长度的顺序为0.25微米,使铁磁纳米管混合有前途的自旋电子学平台。自旋输运的Y结与内置的异质势垒已经是有趣的和未探索的。但是,使所提出的器件独特的是将铁磁和正常金属接触应用于Y结的三个端子的可能性,以及使用不同的铁磁材料(具有可单独切换的磁化)用于同一器件的接触。 这种前所未有的灵活性将使我们能够,例如,清楚地区分自旋介导的电流注入和提取与普通注入,通过第三端子上的控制电压来调谐自旋上升和自旋下降电子的传输,通过利用外场切换磁化来将自旋相干电流从一个Y结臂切换到另一个Y结臂,并且更一般地产生真正的三端自旋电子晶体管。然而,这种新的纳米结构系统的潜力可能是巨大的,大量的具有挑战性的工作,从Y-结纳米管的制造到纳米级接触的制造,再到在外部调制磁场存在下对接触的Y-结进行低温测量,必须首先证明这些概念。 这个NSF项目是为了这些概念验证探索而启动的,并为这个新的和令人兴奋的机会领域铺平了道路。
项目成果
期刊论文数量(0)
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会议论文数量(0)
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Jimmy Xu其他文献
Graphene‐Based Terahertz Devices: Concepts and Characteristics
基于石墨烯的太赫兹器件:概念和特点
- DOI:
10.1002/9780470649343.ch25 - 发表时间:
2010 - 期刊:
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S. Luryi;Jimmy Xu;A. Zaslavsky - 通讯作者:
A. Zaslavsky
Mid-infrared metasurface made of composite right/left-handed transmission-line
由复合右/左手传输线制成的中红外超表面
- DOI:
10.1063/1.4953263 - 发表时间:
2016-06 - 期刊:
- 影响因子:4
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Yi Luo;Xiangxiao Ying;Yang Pu;Yadong Jiang;Jimmy Xu;Zhijun Liu - 通讯作者:
Zhijun Liu
Wireless, Implantable Neuroprostheses: Applying Advanced Technology to Untether the Mind
无线植入式神经假体:应用先进技术解放思想
- DOI:
10.1002/9781118678107.ch21 - 发表时间:
2013 - 期刊:
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S. Luryi;Jimmy Xu;A. Zaslavsky - 通讯作者:
A. Zaslavsky
Graphene-Based Integrated Electronic, Photonic and Spintronic Circuit
基于石墨烯的集成电子、光子和自旋电子电路
- DOI:
10.1002/9781118678107.ch23 - 发表时间:
2013 - 期刊:
- 影响因子:0
- 作者:
S. Luryi;Jimmy Xu;A. Zaslavsky - 通讯作者:
A. Zaslavsky
Lateral mode dynamics of semiconductor lasers
半导体激光器的横向模式动力学
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- 发表时间:
1999 - 期刊:
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- 作者:
R. Gordon;Jimmy Xu - 通讯作者:
Jimmy Xu
Jimmy Xu的其他文献
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1430007 - 财政年份:2014
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