Controlling Emergent Orders in Quantum Materials

控制量子材料中的紧急秩序

• 批准号: EP/R031924/1
• 负责人: Peter Wahl
• 金额: $ 128.95万
• 依托单位: University of St Andrews
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2018
• 资助国家: 英国
• 起止时间: 2018 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FR031924%2F1
• 关键词: Controlling; Emergent; Orders; Quantum; Materials

The properties of normal metals and insulators are quite well understood and numerical calculations of the electronic structures provide often astonishing precision, enabling a computational approach to designing materials with a specific property. This level of understanding has been instrumental in the development of semiconductor electronics. Quantum Materials exhibit a vast range of desirable properties, enabling new functionality, however these are usually unexpected and their properties cannot be predicted. Prime examples for the surprising properties of quantum materials are colossal magnetoresistance and high-temperature superconductivity. High temperature superconductivity occurs at temperatures of almost ten times higher than in conventional superconductors (except under pressure), whereas colossal magnetoresistance exhibits a change in resistivity with magnetic field which is orders of magnitude larger than for giant magnetoresistance, for the discovery of which the Nobel prize was awarded in 2007. Reaping the properties of quantum materials for applications has remained elusive, and a lack of understanding of their physics is a major obstacle to achieving this.Reaping the properties of quantum materials for applications has remained elusive. The vast majority of our knowledge about the properties of these materials comes from bulk probes which have provided information about the exotic phases in these materials with exquisite detail. Yet for interfacing to the outside world, it is important to understand the impact of surfaces and interfaces on their emergent properties. The impact of these will provide new opportunities to control their properties, which might lead to entirely new functionalities. For emergent magnetic orders, our knowledge about the impact of the surface in these materials is currently practically zero, therefore this proposal aim to build unique new capability.The here proposed research programme will address this, and lead to(1) An understanding of the impact of surfaces and interfaces on emergent orders, which are critical to technological exploitation(2) Development new methods for atomic scale imaging and characterization of magnetic structure and magnetic excitations(3) Exploration of novel ways to control emergent magnetic states in reduced dimensionalitiesThis will be achieved through a multi-faceted approach combining methods which probe magnetic states at different depths from the surface, thereby enabling a complete characterization of the surface or interface impact on emergent magnetic states.

正常金属和绝缘子的特性已经充分理解，电子结构的数值计算通常提供了惊人的精度，从而使计算方法能够使用特定特性设计材料。这种理解水平对半导体电子的发展产生了重要作用。量子材料具有广泛的理想特性，可以实现新功能，但是这些功能通常是出乎意料的，并且无法预测它们的特性。量子材料令人惊讶特性的主要示例是巨大的磁性和高温超导性。高温超导率在温度上发生近十倍，比传统超导体高十倍（在压力下除外），而巨大的磁倍率显示出具有磁场的电阻率的变化，而磁场的电阻率是大于巨型磁场的数量级，而对于诺贝尔来说，这是诺贝尔的。奖品于2007年颁发。在应用量子材料的特性仍然难以捉摸，对其物理学的了解不足是实现这一目标的主要障碍。将量子材料用于应用程序的属性仍然难以捉摸。我们对这些材料特性的绝大多数知识都来自批量探针，这些探针提供了有关这些材料中外来阶段的信息，并具有精美的细节。然而，要与外界接口，重要的是要了解表面和界面对它们新兴特性的影响。这些影响将为控制其财产提供新的机会，这可能会导致全新的功能。对于紧急磁性订单，我们对这些材料中表面影响的了解实际上是零，因此该提案旨在建立独特的新能力。此处提出的研究计划将解决这一问题，并导致（1）对表面和界面对紧急订单的影响，这对于技术剥削至关重要（2）开发原子尺度成像的新方法以及磁性结构和磁激发的表征（3）探索在减少尺寸dimensionitionalitiesthis中控制新兴磁状态的新方法将是通过多面方法结合方法来实现，该方法结合了从表面不同深度探测磁性状态的方法，从而使表面或界面的完整表征对出现的磁性状态产生影响。

项目成果

Multi-fixed point numerical conformal bootstrap: a case study with structured global symmetry

多定点数值共形自举：具有结构化全局对称性的案例研究

• DOI: 10.1007/jhep03(2021)147
• 发表时间: 2021
• 期刊: Journal of High Energy Physics
• 影响因子: 5.4
• 作者: Dowens M

Fisher zeros and persistent temporal oscillations in non-unitary quantum circuits

非酉量子电路中的费雪零点和持续时间振荡

• DOI: 10.48550/arxiv.2103.10628
• 发表时间: 2021
• 作者: Basu S

Spin-orbit driven superconducting proximity effects in Pt/Nb thin films.

• DOI: 10.1038/s41467-023-40757-1
• 发表时间: 2023-08-21
• 期刊: NATURE COMMUNICATIONS
• 影响因子: 16.6
• 作者: Flokstra, Machiel;Stewart, Rhea;Yim, Chi-Ming;Trainer, Christopher;Wahl, Peter;Miller, David;Satchell, Nathan;Burnell, Gavin;Luetkens, Hubertus;Prokscha, Thomas;Suter, Andreas;Morenzoni, Elvezio;Bobkova, Irina V.;Bobkov, Alexander M.;Lee, Stephen
• 通讯作者: Lee, Stephen

Interplay of ferromagnetism and spin-orbit coupling in Sr 4 Ru 3 O 10

Sr 4 Ru 3 O 10 中铁磁性和自旋轨道耦合的相互作用

• DOI: 10.1103/physrevb.106.l241107
• 发表时间: 2022
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: Benedicic I

Perovzalates: a family of perovskite-related oxalates.

• DOI: 10.1039/c9dt03149a
• 发表时间: 2019-10
• 期刊: Dalton transactions
• 影响因子: 4
• 作者: Rebecca Clulow;Alasdair J. Bradford;Stephen L. Lee;P. Lightfoot