Aspects of non-Fermi liquid behaviour in metallic magnets

金属磁体中非费米液体行为的各个方面

• 批准号: 36391564
• 负责人: Professorin Dr. Inga Fischer
• 金额: --
• 依托单位: Department of Physics
• 依托单位国家: 德国
• 项目类别: Research Fellowships
• 财政年份: 2007
• 资助国家: 德国
• 起止时间: 2006-12-31 至 2007-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/36391564?language=en
• 关键词: Aspects; non; Fermi; liquid; behaviour

Fermi liquid theory is one of the most important theories in condensed matter physics. While it successfully models many aspecs of the physics of metals, there is continuing experimental and theoretical interest in materials whose behaviour is not captured by Fermi liquid phenomenology. In this project I plan to investigate theoretically aspects of two kinds of metallic magnets in which non-Fermi liquid behaviour can be observed: metallic magnets without inversion symmetry, in particular MnSi, and antiferromagnetic metals. In MnSi, my aim is to explore the route of electron fractionalization as a possible mechanism for the anomalous T3/2 temperature dependence of the resistivity observed in experiment. In the second part of my project, my goal is to investigate the interplay of order parameter fluctuations and electronic degrees of freedom in the phase diagram of antiferromagnetic metals by means of functional renormalization group calculations.

费米液体理论是凝聚态物理中最重要的理论之一。虽然它成功地模拟了金属物理学的许多方面，但人们对费米液体现象学没有捕捉到的材料的行为仍有持续的实验和理论兴趣。在这个项目中，我计划从理论上研究两种可以观察到非费米液体行为的金属磁体：不具有反转对称性的金属磁体，特别是MnSi，以及反铁磁性金属。在MNSI中，我的目的是探索电子分馏的途径，作为在实验中观察到的电阻率的反常的T_3/2温度依赖的可能机制。在我的项目的第二部分，我的目标是通过泛函重整化群计算来研究反铁磁性金属相图中序参数涨落和电子自由度之间的相互作用。