Dirac and Weyl semimetals

狄拉克和韦尔半金属

• 批准号: 290387256
• 负责人: Dr. Sergey Borisenko
• 金额: --
• 依托单位: Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden (IFW) e.V.
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/290387256?language=en
• 关键词: Dirac; Weyl; semimetals

We propose to identify novel materials which host three-dimensional Dirac or Weyl points and investigate their electronic structure by means of angle-resolved photoemission spectroscopy. We will focus on those compounds which have been predicted theoretically by means of DFT theory and analysis of topological invariants or Berry curvatures. Special attention will be paid to possible realization of the Weyl state in Bi-containing quasi-two dimensional systems with strongly anisotropic Dirac dispersions. In particular, the time-reversal symmetry breaking Weyl state will be searched for in canted antiferromagnets and inversion symmetry breaking Weyl state - in compounds without center of inversion. Systematic studies of fine details of the surface and bulk electronic structures of candidate materials are anticipated to identify the Dirac and/or Weyl semimetallic states and provide possible practical routes for a targeted synthesis of new materials.

我们建议，以确定新的材料，主机三维狄拉克或外尔点，并通过角度分辨光电子能谱研究其电子结构。我们将重点讨论那些已经通过DFT理论和拓扑不变量或Berry曲率的分析在理论上预测的化合物。特别注意的是可能实现的外尔态在含Bi的准二维系统与强各向异性狄拉克色散。特别是在倾斜反铁磁体中寻找时间反演对称破缺Weyl态，在没有反转中心的化合物中寻找反转对称破缺Weyl态。对候选材料的表面和体电子结构的精细细节的系统研究预计将识别狄拉克和/或外尔半金属态，并为新材料的有针对性的合成提供可能的实用路线。

项目成果

A Giant Bulk‐Type Dresselhaus Splitting with 3D Chiral Spin Texture in IrBiSe

IrBiSe 中具有 3D 手性自旋纹理的巨型散装型 Dresselhaus 分裂

• DOI: 10.1002/pssr.201900684
• 发表时间: 2020-04
• 期刊: physica status solidi (RRL) – Rapid Research Letters
• 作者: Zhonghao Liu;Setti Thirupathaiah;Alex;er N. Yaresko;Satya Kushwaha;Quinn Gibson;Wei Xia;Yanfeng Guo;Dawei Shen;Robert J. Cava;Sergey V. Borisenko
• 通讯作者: Sergey V. Borisenko

Strongly correlated superconductor with polytypic 3D Dirac points

• DOI: 10.1038/s41535-020-00268-4
• 发表时间: 2019-09
• 期刊: npj Quantum Materials
• 影响因子: 5.7
• 作者: S. Borisenko;V. Bezguba;A. Fedorov;Y. Kushnirenko;V. Voroshnin;Mihai I. Sturza;S. Aswartham;A. Yaresko

Possible experimental realization of a basic Z2 topological semimetal in GaGeTe

• DOI: 10.1063/1.5124563
• 发表时间: 2019-12-01
• 期刊: APL MATERIALS
• 影响因子: 6.1
• 作者: Haubold, Erik;Fedorov, Alexander;Borisenko, Sergey
• 通讯作者: Borisenko, Sergey

Time-reversal symmetry breaking type-II Weyl state in YbMnBi2

• DOI: 10.1038/s41467-019-11393-5
• 发表时间: 2019-07-31
• 期刊: NATURE COMMUNICATIONS
• 影响因子: 16.6
• 作者: Borisenko, Sergey;Evtushinsky, Daniil;Cava, Robert J.
• 通讯作者: Cava, Robert J.

TaIrTe4: A ternary type-II Weyl semimetal

• DOI: 10.1103/physrevb.93.201101
• 发表时间: 2016-05-05
• 期刊: PHYSICAL REVIEW B
• 影响因子: 3.7
• 作者: Koepernik, K.;Kasinathan, D.;van den Brink, Jeroen
• 通讯作者: van den Brink, Jeroen