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.

普通金属和绝缘体的性质已经被很好地理解，电子结构的数值计算通常提供惊人的精度，使计算方法能够设计具有特定性质的材料。这种程度的理解对半导体电子学的发展起到了重要作用。量子材料展示了广泛的理想特性，实现了新的功能，然而这些通常是意想不到的，它们的特性无法预测。量子材料惊人特性的主要例子是巨大的磁电阻和高温超导性。高温超导的发生温度几乎是传统超导体的十倍（除了在压力下），而巨磁电阻的电阻率随磁场的变化比巨磁电阻大几个数量级，这一发现于2007年获得了诺贝尔奖。获得用于应用的量子材料的特性仍然是难以捉摸的，缺乏对其物理特性的理解是实现这一目标的主要障碍。获得用于应用的量子材料的特性仍然是难以捉摸的。我们对这些材料性质的绝大多数知识来自体探针，它们提供了这些材料中奇异相的详细信息。然而，对于与外部世界的接口，理解表面和接口对其涌现特性的影响是很重要的。这些影响将为控制其属性提供新的机会，这可能导致全新的功能。对于紧急磁订单，我们对这些材料表面影响的知识目前几乎为零，因此该提案旨在建立独特的新能力。本文提出的研究计划将解决这一问题，并导致(1)了解表面和界面对紧急订单的影响；(2)开发原子尺度成像和表征磁结构和磁激励的新方法(3)探索在降维中控制紧急磁态的新方法这将通过多方面的方法来实现，这些方法结合了从表面不同深度探测磁态的方法。从而能够完整地表征表面或界面对紧急磁态的影响。

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

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

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

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

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