Theoretical studies of topological and electron correlation effects in graphene

石墨烯拓扑和电子相关效应的理论研究

基本信息

项目摘要

I studied electronic and topological properties of graphene and silicene (graphene's cousin).In particular, I analyzed various topological insulators and their topological phase transitions. Main results read as follows: The zero-energy sector of the triangular zigzag graphene is investigated based on the Dirac theory of graphene.Analytic wave functions of triangular graphene are obtained. A vortex with the winding number 2 emerges in triangular graphene. Graphene nanodisk arrays have multi-degenerate perfect flat bands and are ferromagnet. The band gap of silicene can be controlled by external electric field applied perpendicular to silicene. Silicene shows the quantum anomalous-Hall effect when ferromagnet is attached. Furthermore, silicene undergoes a topological phase transition by photo-irradiation, where single-Dirac cone states appear at the critical point.I also studied the skyrmion, which is a topological structure in magnet.
我研究了石墨烯和硅(石墨烯的表弟)的电子和拓扑特性。尤其是我分析了各种拓扑绝缘子及其拓扑相变。主要结果如下:基于狄拉克石墨烯的狄拉克论理论,研究了三角形锯齿形石墨烯的零能源扇形。三角形石墨烯中出现了带有绕组2的涡流。石墨烯纳米数阵列具有多分化的完美平坦带,并且是铁磁体。可以通过垂直于硅硅的外部电场来控制硅的带隙。当连接铁磁铁时,硅烯显示了量子异常的效应。此外,硅烯通过光辐射进行了拓扑相变,单迪拉克锥态出现在临界点上。我还研究了Skyrmion,这是磁铁中的拓扑结构。

项目成果

期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Giant Skyrmions Stabilized by Dipole-Dipole Interactions in Thin Ferromagnetic Films
  • DOI:
    10.1103/physrevlett.105.197202
  • 发表时间:
    2010-11-02
  • 期刊:
  • 影响因子:
    8.6
  • 作者:
    Ezawa, Motohiko
  • 通讯作者:
    Ezawa, Motohiko
Skyrmion Burst and Multiple Quantum Walk in Thin Ferromagnetic Films
铁磁薄膜中的斯格明子爆发和多重量子行走
  • DOI:
    10.1016/j.physleta.2011.08.030
  • 发表时间:
    2011
  • 期刊:
  • 影响因子:
    0
  • 作者:
    渡邊浩;ニコラ・ブレフェル,毛利真一郎,ジャン・ピエール・ツシャゲ;エリック・コレ、田中耕一郎;M. Ezawa;H.Watanabe;M. Ezawa;秋月直人;毛利真一郎;M. Ezawa;岩村宗千代;M. Ezawa;毛利真一郎;M. Ezawa;秋月直人;岩村宗千代;M. Ezawa;毛利真一郎;M. Ezawa
  • 通讯作者:
    M. Ezawa
Compact merons and skyrmions in thin chiral magnetic films
  • DOI:
    10.1103/physrevb.83.100408
  • 发表时间:
    2011-03-18
  • 期刊:
  • 影响因子:
    3.7
  • 作者:
    Ezawa, Motohiko
  • 通讯作者:
    Ezawa, Motohiko
Quantum Hall Effects in Silicene
シリセンにおけるトポロジカル絶縁体
硅烯中的拓扑绝缘体
  • DOI:
  • 发表时间:
    2012
  • 期刊:
  • 影响因子:
    0
  • 作者:
    山影相;江澤雅彦;田仲由喜夫;永長直人;毛利真一郎;M. Ezawa;毛利真一郎;M. Ezawa;宮内雄平;Motohiko Ezawa;岩村宗千代;Motohiko Ezawa;小澤大知;山影相,江澤雅彦,田仲由喜夫,永長直人;秋月直人;江澤雅彦
  • 通讯作者:
    江澤雅彦
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前往

EZAWA Motohiko的其他基金

Nanoelectronics and Spintronics on Graphene
石墨烯纳米电子学和自旋电子学
  • 批准号:
    20840011
    20840011
  • 财政年份:
    2008
  • 资助金额:
    $ 2万
    $ 2万
  • 项目类别:
    Grant-in-Aid for Young Scientists (Start-up)
    Grant-in-Aid for Young Scientists (Start-up)

相似海外基金

Phonon and electron system with different dimensions formed by silicene manipulation and development of high performance thermoelectric thin film device
硅烯操控形成不同维度的声子和电子体系及高性能热电薄膜器件的开发
  • 批准号:
    23H00258
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  • 财政年份:
    2023
  • 资助金额:
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  • 项目类别:
    Grant-in-Aid for Scientific Research (A)
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Global structure search of two-dimensional materials based on evolutionary algorithms and gaussian process regression
基于进化算法和高斯过程回归的二维材料全局结构搜索
  • 批准号:
    21K03419
    21K03419
  • 财政年份:
    2021
  • 资助金额:
    $ 2万
    $ 2万
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    Grant-in-Aid for Scientific Research (C)
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二次元IV族原子層の選択的元素置換による熱電変換用新ディラック材料の開発
通过二维 IV 族原子层中的选择性元素替代开发用于热电转换的新型狄拉克材料
  • 批准号:
    20J10412
    20J10412
  • 财政年份:
    2020
  • 资助金额:
    $ 2万
    $ 2万
  • 项目类别:
    Grant-in-Aid for JSPS Fellows
    Grant-in-Aid for JSPS Fellows
Silicene surrounded by oxide -quality improvement and its application to transistors
氧化物包围硅烯的质量改进及其在晶体管中的应用
  • 批准号:
    17KK0125
    17KK0125
  • 财政年份:
    2018
  • 资助金额:
    $ 2万
    $ 2万
  • 项目类别:
    Fund for the Promotion of Joint International Research (Fostering Joint International Research)
    Fund for the Promotion of Joint International Research (Fostering Joint International Research)
Material design of group-IV alloy monolayers using bond engineering concept
使用键合工程概念进行 IV 族合金单层材料设计
  • 批准号:
    17K05056
    17K05056
  • 财政年份:
    2017
  • 资助金额:
    $ 2万
    $ 2万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
    Grant-in-Aid for Scientific Research (C)