Quantum Spin Systems and Magnetic Frustration Investigated with High Frequency AC Susceptibility and Muons

用高频交流磁化率和 μ 子研究量子自旋系统和磁挫败

基本信息

批准号：
1797796
负责人：
金额：
--
依托单位：
CARDIFF UNIVERSITY
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2016
资助国家：
英国
起止时间：
2016 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=studentship-1797796
关键词：
Quantum Spin Systems Magnetic Frustration

项目摘要

The study of fundamental properties of magnetic materials constantly evolves resulting in the observation of exciting new physical behaviour. This project will involve the study of geometrically frustrated materials, where magnetic interactions cannot be satisfied on a lattice leading to more than one ground state, a so called degenerate state. The work is an exciting area of condensed matter physics because excitations out of the ground state can reveal behaviour such as the observation of magnetic monopoles in the frustratedmaterial spin ice and because some ground states are always fluctuating because the quantum interactions become dominant. The large number of papers in Nature and Science in recent years demonstrate the vitality of this research area.This project will involve looking at dynamics of frustrated systems showing quantum behaviour, using a unique high frequency susceptometer and a superconducting quantum interference device developed in Cardiff at temperatures below 1 K. You will learnt the art of low temperature techniques, a highly desired skill in the drive for superconducting qubits. The work will be supported using complimentary techniques such as muons which are atomic probes of spin dynamics. Experimental work will be performed in Cardiff onour state of the art dilution fridge system and susceptometer, and at muon facilities in both Switzerland and Oxford. You will have the opportunity to travel to international conferences to present your work as well as publishing your work. This combination of techniques is available in only a few places in the world and will enable you to understand complex behaviour of frustrated materials.

磁性材料的基本特性的研究不断发展，从而观察到令人兴奋的新身体行为。该项目将涉及对几何沮丧的材料的研究，在该材料中，无法在导致多个基态的晶格上满足磁相互作用，即所谓的退化状态。这项工作是凝结物理学的令人兴奋的区域，因为从基态之外的激发可以揭示出诸如沮丧的材料旋转冰中磁性单孔的行为，并且因为某些基态始终在波动，因为量子相互作用占主导地位。近年来，大量的自然和科学论文表明了该研究领域的活力。该项目将涉及使用沮丧的系统的动态，使用独特的高频启动器和在1 K以下的温度下开发的Cardiff中开发的超导量子干扰装置。您将了解低温技术的艺术，高度良好的技能，以实现高度的驱动力，以实现超级能力的驱动力。这项工作将使用免费技术（例如旋转动力学的原子探针）来支持。实验性工作将在Cardiff Onour的最先进的稀释冰箱系统和声音仪以及瑞士和牛津的MUON设施中进行。您将有机会前往国际会议来展示您的作品以及发布您的作品。这种技术组合仅在世界上的几个地方提供，它将使您能够理解沮丧的材料的复杂行为。

项目成果

期刊论文数量（3）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Dipolar Spin Ice States with a Fast Monopole Hopping Rate in CdEr_{2}X_{4} (X=Se, S).

DOI：
10.1103/physrevlett.120.137201
发表时间：
2017-05
期刊：
Physical review letters
影响因子：
8.6
作者：
Shang Gao;O. Zaharko;V. Tsurkan;L. Prodan;E. Riordan;Jorge Lago;Bjorn Faak;Andrew R. Wildes;Marek M. Koza;Clemens Ritter;Peter Fouquet;Lukas Keller;Emmanuel Can'evet;M. Medarde;Jakob Blomgren;Christer Johansson;Sean Giblin;S. Vrtnik;Jovze Luzar;A. Loidl;Christian Ruegg;Tom Fennell
通讯作者：
Shang Gao;O. Zaharko;V. Tsurkan;L. Prodan;E. Riordan;Jorge Lago;Bjorn Faak;Andrew R. Wildes;Marek M. Koza;Clemens Ritter;Peter Fouquet;Lukas Keller;Emmanuel Can'evet;M. Medarde;Jakob Blomgren;Christer Johansson;Sean Giblin;S. Vrtnik;Jovze Luzar;A. Loidl;Christian Ruegg;Tom Fennell

Tuning the dynamics in Fe3O4 nanoparticles for hyperthermia optimization