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，又能推动社会关键技术的进步。对量子自旋液体(QSL)的长达40年的探索概括了这一说法；最初预计这是支持高温超导的，但这种难以捉摸的搜索意外地导致了基础凝聚态物理学中一些最具开创性的发现。到目前为止，对QSL的搜索受到以下因素的限制：缺乏可供研究的模型材料、制作它们的难度以及对它们进行表征所带来的挑战。这个项目将建立在我们最近解决这些瓶颈的工作的基础上，通过合成最近发现的QSL模型系统的高质量样品，并主要用最先进的中子散射技术来表征其性质。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。-利用中子衍射表征QSL单晶的晶体和磁序以及激发，非弹性中子散射和电子显微镜。-提供高质量的非弹性中子散射培训和线性自旋波理论分析。-提供材料科学前沿的合成和材料表征技术方面的广泛培训。方法：该项目基于最近发现的高度受挫的自旋1/2量子Kagome磁体的合成和物理表征。它将涉及高质量的合成和单晶生长、结晶学和中子散射研究，这些研究将用于解决该材料家族的磁结构、激发和基态。该项目将涉及广泛使用UKRI资助的设施：ISIS中子和Muon源、钻石光源和Laue-Langevin研究所的中子源。该项目由格拉斯哥大学和劳伊-朗之万研究所共同出资，两所机构的时间大约各占一半。“