Dynamics, disorder and noise in quantum spin liquids

量子自旋液体中的动力学、无序和噪声

• 批准号: 2275086
• 金额: --
• 依托单位: University of Cambridge
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2275086
• 关键词: Dynamics; disorder; noise; quantum; spin

Recent experimental advances in growth and characterisation of candidate materials for quantum spin liquid behaviour have brought to the fore an unprecedented ability to control and understand the role of disorder. The resulting phenomenology is excitingly varied, including instances of localisation and glassiness, scattering of topological excitations, and tunability of effective quantum fluctuations in non-Kramer ions. We plan to study these effects theoretically, with the help of Monte Carlo simulations of classical equivalent systems, as well as exact diagonalisation of quantum toy models, and effective analytical approaches. We are particularly interested in understanding the relaxation and response processes in these systems, and in making predictions for example on their magnetic noise that may be accessed experimentally in state of the art ultrafast spectroscopy or SQUID measurements.

最近在量子自旋液体行为候选材料的生长和表征方面的实验进展，使人们能够前所未有地控制和理解无序的作用。由此产生的现象是令人兴奋的多样化，包括局部化和玻璃性，拓扑激发的散射，以及非克莱默离子中有效量子涨落的可调性。我们计划在理论上研究这些效应，借助经典等效系统的蒙特卡罗模拟，以及量子玩具模型的精确对角化和有效的分析方法。我们对了解这些系统中的弛豫和响应过程特别感兴趣，并对其磁噪声进行预测，例如可以通过最先进的超快光谱或SQUID测量进行实验。

项目成果

Dynamical fractal and anomalous noise in a clean magnetic crystal

• DOI: 10.1126/science.add1644
• 发表时间: 2022-10
• 期刊: Science
• 影响因子: 56.9
• 作者: Jonathan N. Hallén;S. Grigera;D. Tennant;C. Castelnovo;R. Moessner

Structural magnetic glassiness in the spin ice Dy2Ti2O7

自旋冰中的结构磁玻璃态 Dy2Ti2O7

• DOI: 10.1103/physrevresearch.4.033159
• 发表时间: 2022
• 期刊: Physical Review Research
• 影响因子: 4.2
• 作者: Samarakoon, Anjana M.;Sokolowski, André;Klemke, Bastian;Feyerherm, Ralf;Meissner, Michael;Borzi, R. A.;Ye, Feng;Zhang, Qiang;Dun, Zhiling;Zhou, Haidong
• 通讯作者: Zhou, Haidong

Structural magnetic glassiness in the spin ice Dy2 Ti2 O7

自旋冰中的结构磁玻璃态 Dy2 Ti2 O7

• DOI: 10.17863/cam.91031
• 发表时间: 2022
• 作者: Samarakoon A

Dynamical fractal and anomalous noise in a clean magnetic crystal.

干净磁性晶体中的动态分形和异常噪声。

• DOI: 10.17863/cam.91960
• 发表时间: 2022
• 作者: Hallén J

Dynamics of frustrated magnetic systems - Emergent fractals and anomalous magnetic noise in spin ice

受挫磁系统的动力学——自旋冰中的突现分形和异常磁噪声

• DOI: 10.17863/cam.97077
• 发表时间: 2023
• 作者: Nilsson Hallén E