Spin-dependent thermo-galvanic effects: Theory

自旋相关热电效应：理论

• 批准号: 198257383
• 负责人: Professor Dr. Hubert Ebert
• 金额: --
• 依托单位: Department Chemie
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2011
• 资助国家: 德国
• 起止时间: 2010-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/198257383?language=en
• 关键词: Spin; dependent; thermo; galvanic; effects

The theory project contributes to the field of Spin Caloritronics by detailed investigations on various spin-dependent thermo-galvanic effects. Material specific calculations based on ab-initio electronic structure methods on the anisotropic Seebeck and anomalous Nernst effects in ferromagnets are meant among other things to reveal their relationship to the anisotropic magneto-resistance and anomalous Hall effect being their electronic counterparts. The work on implicitly spin-dependent effects will be continued by investigating the spin Seebeck and spin Nernst effects that have a great potential for applications as they lead directly to spin currents. The spin Nernst effect as the counterpart to the spin Hall effect is expected to exist even for non-magnetic materials. A central issue of the investigations on the various types of the Nernst effect will be the scaling behavior of different transport coefficients with respect to the corresponding isotropic conductivity. This gives information on the dominating scattering mechanisms responsible for the extrinsic contributions to the Nernst effects. Investigations on disordered alloys are performed, in particular, to exploit the concentration as an implicit parameter for an analysis of the scaling behavior. Corresponding work on layered systems will focus on the influence of specific system parameters. All work will be done in close collaboration with experimental partners to support their activities and to get important feedback for further developments.

该理论项目通过对各种旋转依赖性热 - 甘瓦尼克效应的详细研究来促进自旋热量汇集的领域。基于Ab-Initio电子结构方法的材料特定计算以及铁磁体中异常的Nernst效应的材料计算是指揭示其与各向异性磁势抗性和异常霍尔的关系的其他因素，是他们的电子对抗的效应。通过研究旋转的Seebeck和Spin Nernst效应，将继续进行隐式自旋依赖性效应的工作，这些效应具有很大的应用，因为它们直接导致了旋转电流。即使对于非磁性材料，也有望存在自旋效应作为自旋大厅效应的对应物。关于NernST效应的各种类型的研究的一个核心问题将是相对于相应的各向同性电导率的不同转运系数的缩放行为。这提供了有关负责对NernST效应的外在贡献的主导散射机制的信息。特别是对无序合金的研究，特别是将浓度作为分析缩放行为分析的隐式参数。分层系统上的相应工作将集中于特定系统参数的影响。所有工作将与实验合作伙伴密切合作，以支持他们的活动并获得重要的反馈以进行进一步发展。