Novel ground states and excitations in quantum spin liquids

量子自旋液体中的新基态和激发

• 批准号: 2888447
• 金额: --
• 依托单位: University of Glasgow
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2888447
• 关键词: Novel; ground; states; excitations; quantum

"Summary:Quantum materials have the powerful ability to both capture the public's imagination and drive advancement of technologies critical to society. The 40 year search for Quantum SpinLiquids (QSLs) encapsulates this statement; originally predicted to underpin high temperature superconductivity, this elusive search has serendipitously led to some of the most groundbreaking discoveries in fundamental condensed matter physics. Up to now, the search for QSLs is limited by the lack of model materials to study, the difficulty in making them and the challenges posed by characterising them. This project will build on our recent work addressing these bottlenecks by synthesising high quality samples of a recently discovered QSL model system and characterising its properties primarily with state-of-the-art neutron scattering techniques.Aims:- Synthesise high quality single crystals of quantum spin liquid candidates and explore routes to electronic doping.- Characterise the crystallographic and magnetic order and excitations of QSL single crystalsusing neutron diffraction, inelastic neutron scattering and electron microscopy.- Provide high quality training in inelastic neutron scattering and analysis with linear spinwave theory.- Provide a broad training in synthesis and materials characterisation techniques at theforefront of materials science.Methodology:This project is based on the synthesis and physical characterization of a recently discovered family of highly frustrated spin 1/2 quantum kagome magnets. It will involve high quality synthesis and single crystal growth, crystallography and neutron scattering studies which will be used to solve the magnetic structures, excitations and ground states of this material family. The project will involve extensive use of UKRI funded facilities: the ISIS Neutron and Muon Source, Diamond Light Source and the neutron source of the Institut Laue-Langevin. The project is co-funded between the University of Glasgow and the Institut Laue-Langevin, with time split roughly 50:50 between both institutions. "

“摘要：量子材料具有强大的能力，既能激发公众的想象力，又能推动对社会至关重要的技术进步。对量子自旋液体 (QSL) 长达 40 年的探索概括了这一说法；最初预计它将支撑高温超导性，但这一难以捉摸的探索已成为现实。偶然地导致了基础凝聚态物理中一些最具突破性的发现，到目前为止，对 QSL 的研究因缺乏可供研究的模型材料而受到限制。该项目将基于我们最近解决这些瓶颈的工作，通过合成最近发现的 QSL 模型系统的高质量样本并主要用最先进的中子来表征其特性。目的：- 合成高质量的量子自旋液体候选单晶，并探索电子掺杂的途径。- 使用中子衍射、非弹性中子表征 QSL 单晶的晶体学和磁序以及激发散射和电子显微镜。- 提供非弹性中子散射和线性自旋波理论分析方面的高质量培训。- 提供材料科学前沿的合成和材料表征技术的广泛培训。方法论：该项目基于合成和物理表征最近发现的一系列高度受阻的自旋 1/2 量子戈薇磁体。它将涉及高质量合成和单晶生长、晶体学和中子散射研究，这些研究将用于解决该材料系列的磁性结构、激发和基态。该项目将广泛使用 UKRI 资助的设施：ISIS 中子和 μ 子源、钻石光源以及劳厄-朗之万研究所的中子源。该项目由格拉斯哥大学和劳厄-朗之万研究所共同资助，两所机构的时间分配大约为 50:50。 ”