演讲嘉宾-Stephan Roche

Stephan Roche
加泰罗尼亚纳米科学和纳米技术研究所
  Stephan Roche是 ICREA的研究员,他是加泰罗尼亚纳米科学与技术研究所(icn2)纳米理论和计量组组长。他是一位理论物理学家,主攻量子传输和纳米材料设备的计算以及模型的发展。
  他的专长包括:n阶量子输运的发展(Kubo和landauer-büttiker电导方面),他已经率先在以石墨烯为基础的化学无序材料和设备的介观输运方面展开研究。
  在工业研究的背景下,他在开发先进的模拟工具方面经验丰富,他与一些大型公司(如NEC,ST微电子,和三星)都有过合作。他石墨烯旗舰计划的组员,负责监督包括石墨烯自旋电子学在内的工作。
演讲题目:Could Graphene and 2D Materials revolutionize Spintronics?Current challenges & opportunities
主题会场石墨烯非传统应用&中西石墨烯双边合作论坛
开始时间
结束时间
内容摘要

Could Graphene and 2D Materials revolutionize Spintronics?Current challenges & opportunities(主题会场:石墨烯非传统应用)

Graphene has been heralded as the ideal material to achieve long spin propagation and further control the spin degree of freedom, in the quest of advancing non-charge-based information processing and computing, and for creating a new generation of active (CMOS compatible) spintronic devices together with non-volatile low energy MRAM memories. Many technological roadblocks and lack of fundamental knowledge are however limiting today´s progress. Indeed, despite ultralow intrinsic and Rashba spin-orbit couplings (SOC) in clean graphene (μeV range), measured spin lifetimes remain in the range of several nanoseconds. This is orders of magnitude shorter than initially predicted, but already enough to envision disruptive non-charge-based room-temperature applications [1]. Besides, the physics of graphene “can be enriched and manipulated” by harvesting the large amount of possibilities of proximity effects with magnetic insulators, strong SOC materials, topological insulators, etc. One challenge is to endow a sizable spin-to-current conversion efficiency by enhancing spin-orbit interaction (say up to meV).  Claims have been made that very large spin Hall angles (figure of merit for spin Hall effect-SHE) could be generated by using chemical functionalization with hydrogen or Au/Cu ad-atoms, or interfacing graphene with WS2 substrate [2]. Those results are however fiercely questioned [3].
In this talk, after presenting the uniqueness of graphene and 2D Materialsfor spintronics applications, I will discuss the fundamentals of spin transport in graphene-based materials, accounting for the effect of substrate, impurities, and ad-atoms. The role of “pseudospin” in driving spin dephasing and relaxation will be unveiled in the ultraclean limit for which electron-hole puddles and micron eV spin-orbit interaction will be explained [4].  Second, I will show how chemical functionalization (fluorine, gold and thallium ad-atoms) and proximity effects with other 2D materials can generate spin-dependent phenomena such as spin filters, quantum spin Hall and tunable spin Hall effects in graphene, all this providing unprecedented options for innovative spin devices and new applications.

关于主办方

联系我们
400-110-3655   

E-mail: meeting@c-gia.cn   meeting01@c-gia.cn

参展电话:13646399362(苏老师)

主讲申请:19991951101(王老师)

官方微信订阅号
Copyright © 中国国际石墨烯创新大会 版权所有     运营机构:北京现代华清材料科技发展中心
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京公网安备 11010802023402号
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凯发_Stephan Roche

凯发

演讲嘉宾-Stephan Roche

Stephan Roche
加泰罗尼亚纳米科学和纳米技术研究所
  Stephan Roche是 ICREA的研究员,他是加泰罗尼亚纳米科学与技术研究所(icn2)纳米理论和计量组组长。他是一位理论物理学家,主攻量子传输和纳米材料设备的计算以及模型的发展。
  他的专长包括:n阶量子输运的发展(Kubo和landauer-büttiker电导方面),他已经率先在以石墨烯为基础的化学无序材料和设备的介观输运方面展开研究。
  在工业研究的背景下,他在开发先进的模拟工具方面经验丰富,他与一些大型公司(如NEC,ST微电子,和三星)都有过合作。他石墨烯旗舰计划的组员,负责监督包括石墨烯自旋电子学在内的工作。
演讲题目:Could Graphene and 2D Materials revolutionize Spintronics?Current challenges & opportunities
主题会场石墨烯非传统应用&中西石墨烯双边合作论坛
开始时间
结束时间
内容摘要

Could Graphene and 2D Materials revolutionize Spintronics?Current challenges & opportunities(主题会场:石墨烯非传统应用)

Graphene has been heralded as the ideal material to achieve long spin propagation and further control the spin degree of freedom, in the quest of advancing non-charge-based information processing and computing, and for creating a new generation of active (CMOS compatible) spintronic devices together with non-volatile low energy MRAM memories. Many technological roadblocks and lack of fundamental knowledge are however limiting today´s progress. Indeed, despite ultralow intrinsic and Rashba spin-orbit couplings (SOC) in clean graphene (μeV range), measured spin lifetimes remain in the range of several nanoseconds. This is orders of magnitude shorter than initially predicted, but already enough to envision disruptive non-charge-based room-temperature applications [1]. Besides, the physics of graphene “can be enriched and manipulated” by harvesting the large amount of possibilities of proximity effects with magnetic insulators, strong SOC materials, topological insulators, etc. One challenge is to endow a sizable spin-to-current conversion efficiency by enhancing spin-orbit interaction (say up to meV).  Claims have been made that very large spin Hall angles (figure of merit for spin Hall effect-SHE) could be generated by using chemical functionalization with hydrogen or Au/Cu ad-atoms, or interfacing graphene with WS2 substrate [2]. Those results are however fiercely questioned [3].
In this talk, after presenting the uniqueness of graphene and 2D Materialsfor spintronics applications, I will discuss the fundamentals of spin transport in graphene-based materials, accounting for the effect of substrate, impurities, and ad-atoms. The role of “pseudospin” in driving spin dephasing and relaxation will be unveiled in the ultraclean limit for which electron-hole puddles and micron eV spin-orbit interaction will be explained [4].  Second, I will show how chemical functionalization (fluorine, gold and thallium ad-atoms) and proximity effects with other 2D materials can generate spin-dependent phenomena such as spin filters, quantum spin Hall and tunable spin Hall effects in graphene, all this providing unprecedented options for innovative spin devices and new applications.

关于主办方

联系我们
400-110-3655   

E-mail: meeting@c-gia.cn   meeting01@c-gia.cn

参展电话:13646399362(苏老师)

主讲申请:19991951101(王老师)

官方微信订阅号
Copyright © 中国国际石墨烯创新大会 版权所有     运营机构:北京现代华清材料科技发展中心
grapchina.org 京ICP备10026874号-12   grapchina.cn 京ICP备10026874号-23
京公网安备 11010802023402号
分享到: