Fluctuation driven ordering phenomena in Kondo materials

近藤材料中波动驱动的有序现象

• 批准号: 2401977
• 金额: --
• 依托单位: University College London
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2020
• 资助国家: 英国
• 起止时间: 2020 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2401977
• 关键词: Fluctuation; driven; ordering; phenomena; Kondo

Quantum fluctuations can lead to exotic ordering phenomena in metals with strong interactions between electrons. Such fluctuations become particularly strong in the vicinity of quantum phase transitions at absolute zero temperature. In the vicinity of such quantum critical points various novel phases of matter are found, such as unconventional superconductivity and exotic magnetic states. The behaviour is even richer in Kondo lattice systems which exhibit local magnetic moments that are interacting with the conduction electrons. The aim of the research project is to theoretically analyse exotic ordering phenomena in such materials, using techniques from many-body field theory, such as perturbative diagrammatic calculations and the renormalisation group. The aim is to understand the underlying fluctuation-driven ordering mechanisms at a fundamental level. This knowledge might feed into technological applications in the long term.

量子涨落可以在电子之间有很强相互作用的金属中导致奇异的有序现象。这种涨落在绝对零度下的量子相变附近变得特别强烈。在这些量子临界点附近发现了各种新的物质相，例如非传统的超导电性和奇异的磁态。在近藤晶格系统中，这种行为甚至更丰富，因为它表现出与传导电子相互作用的局部磁矩。该研究项目的目的是利用多体场理论中的技术，如微扰图计算和重整化群，从理论上分析此类材料中的奇异有序化现象。其目的是在基本水平上理解潜在的波动驱动的有序机制。从长远来看，这些知识可能会被注入到技术应用中。