Theoretical Study of Spintronics Devices Based on Two-Dimensional Materials
基于二维材料的自旋电子器件理论研究
基本信息
- 批准号:20J22909
- 负责人:
- 金额:$ 1.6万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for JSPS Fellows
- 财政年份:2020
- 资助国家:日本
- 起止时间:2020-04-24 至 2023-03-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
A first-principles study was done to look at the effect of spin-orbit coupling (SOC) on the interface between graphene (Gr) and nickel (Ni). Due to SOC, when Ni atoms were far from the interface, they were magnetized in a parallel direction to the interface. As they move toward the interface, they begin to rotate in a direction perpendicular to the interface until they have full perpendicular magnetization at the interface. This rotation is caused by the fact that hybridization with Gr reduces the in-plane orbital moment and makes the out-of-plane orbital moment stronger at the interface. This result was also applied to the hexagonal Boron Nitride (hBN)/Ni interface. Further, it was confirmed that this effect does not affect the controllable Dirac cone of graphene in the proposed Ni/Gr/Ni as well as Ni/hBN-Gr-hBN/Ni device, showing the effectiveness of controlling in-plane spin-current on Gr for the spin-valve device.Parallelly, we found a spin-flipping mechanism that can be initiated on the induced magnetic moment of C atoms in Gr/Ni when it hybridizes with a metal atom of the metal complex and a mechanical disturbance is made to the metal complex. This spin-flipping happens because the density of states of C atoms in the spin-majority channel near Fermi energy moves from energy levels below Fermi energy to energy levels above Fermi energy due to changes in the strength of the bonds, reducing the electron population in the spin-majority channel. This mechanism can be used for local control of the graphene Dirac cone, fine-tuning the in-plane conductance of graphene.
进行了第一性原理研究,以观察自旋轨道耦合 (SOC) 对石墨烯 (Gr) 和镍 (Ni) 之间界面的影响。由于 SOC,当 Ni 原子远离界面时,它们会沿与界面平行的方向被磁化。当它们移向界面时,它们开始沿垂直于界面的方向旋转,直到它们在界面处具有完全垂直的磁化。这种旋转是由于与 Gr 的杂化降低了面内轨道矩并使界面处的面外轨道矩更强而引起的。该结果也适用于六方氮化硼(hBN)/Ni 界面。此外,还证实这种效应不会影响所提出的 Ni/Gr/Ni 以及 Ni/hBN-Gr-hBN/Ni 器件中石墨烯的可控狄拉克锥,显示了自旋阀器件控制 Gr 上面内自旋电流的有效性。同时,我们发现了一种自旋翻转机制,当 Gr/Ni 中的 C 原子与 金属络合物的金属原子并对金属络合物进行机械扰动。发生这种自旋翻转的原因是,由于键强度的变化,费米能附近的自旋多数通道中的 C 原子的态密度从费米能量以下的能级移动到费米能量以上的能级,从而减少了自旋多数通道中的电子数量。该机制可用于石墨烯狄拉克锥的局部控制,微调石墨烯的面内电导。
项目成果
期刊论文数量(13)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Controlling the Gapped Dirac Cone of Graphene through Pseudospin to Achieve Colossal in-Plane Magnetoresistance
通过赝自旋控制石墨烯的有间隙狄拉克锥以实现巨大的面内磁阻
- DOI:
- 发表时间:2021
- 期刊:
- 影响因子:0
- 作者:Yusuf Wicaksono;Halimah Harfah;Gagus Ketut Sunnardianto;Muhammad Aziz Majidi;and Koichi Kusakabe
- 通讯作者:and Koichi Kusakabe
High magnetoresistance of hexagonal boron nitride-graphene heterostructure-based MTJ through excited-electron transmission
通过激发电子传输实现基于六方氮化硼-石墨烯异质结构的 MTJ 的高磁阻
- DOI:
- 发表时间:2022
- 期刊:
- 影响因子:0
- 作者:Halimah Harfah;Yusuf Wicaksono;Gagus K. Sunnardianto;Muhammad A. Majidi;Koichi Kusakabe
- 通讯作者:Koichi Kusakabe
Spin-mechatronics device based on controllable mass gapped Dirac cone of graphene in a Ni/hBN-graphene-hBN/Ni magnetic junction
Ni/hBN-石墨烯-hBN/Ni磁结中基于可控质量间隙石墨烯狄拉克锥的自旋机电一体化装置
- DOI:
- 发表时间:2022
- 期刊:
- 影响因子:0
- 作者:Yusuf Wicaksono;Halimah Harfah;Gagus K. Sunnardianto;Muhammad A. Majidi;Koichi Kusakabe
- 通讯作者:Koichi Kusakabe
Theoretical Study on Optical-induced Magnetic Tunnel Junction based on Gr-hBN Heterostructure
基于Gr-hBN异质结构的光致磁隧道结理论研究
- DOI:
- 发表时间:2021
- 期刊:
- 影响因子:0
- 作者:Yusuf Wicaksono;Halimah Harfah;Muhammad Aziz Majidi;Koichi Kusakabe
- 通讯作者:Koichi Kusakabe
Spin-Topological Electronic Valve in Ni/hBN-Graphene-hBN/Ni Magnetic Junction
- DOI:10.3390/magnetochemistry9050113
- 发表时间:2023-04-25
- 期刊:
- 影响因子:2.7
- 作者:Wicaksono,Yusuf;Harfah,Halimah;Kusakabe,Koichi
- 通讯作者:Kusakabe,Koichi
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Wicaksono Yusuf其他文献
有機材料ならではの機能をもった次世代トランジスタの開発
开发具有有机材料特有功能的下一代晶体管
- DOI:
- 发表时间:
2021 - 期刊:
- 影响因子:0
- 作者:
Harfah Halimah;Wicaksono Yusuf;Sunnardianto Gagus Ketut;Majidi Muhammad Aziz;Kusakabe Koichi;若山 裕 - 通讯作者:
若山 裕
コヒーレントフォノン導入によるディラック点の移動とアームチェア・エッジ状態の理論
引入相干声子的狄拉克点运动理论和扶手椅边缘态
- DOI:
- 发表时间:
2018 - 期刊:
- 影响因子:0
- 作者:
草部浩一;西口和孝;寺西慎伍;Wicaksono Yusuf - 通讯作者:
Wicaksono Yusuf
Wicaksono Yusuf的其他文献
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