Strain-Tuning of Emergent states of Matter

物质紧急状态的应变调整

• 批准号: EP/S005005/1
• 负责人: Peter Wahl
• 金额: $ 93.9万
• 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%2FS005005%2F1
• 关键词: Strain; Tuning; Emergent; states; Matter

Future technologies such as spintronics or integrated quantum sensors require materials that do not only have outstanding electronic properties but incorporate intricate complex magnetic and structural functionalities. One large class of compounds that has the potential to play a key role in such technologies are 'Quantum Materials'. The overarching commonality is that the properties of these materials are governed by quintessential quantum mechanical phenomena e.g. stabilising coherent many body phases which are driven by electron-electron interactions. The physics of these truly advanced materials is governed by a strong interplay between different competing magnetic, charge and orbital degrees of freedom with the emergent phenomena often posing a fundamental challenge to our current level of understanding. A feature central to our proposal is that the large number of competing or cooperating charge and spin orders result in an extreme tunability of the physical properties of quantum materials - they are highly sensitive to external stimuli. This sensitivity of course makes them very attractive for applications which require controlling currents, magnetism or sensing environmental parameters. Here we will exploit this tunability through uniaxial strain, a key control parameter which has received increased attention recently. Its capability for selective symmetry control by lattice straining has been very successful in strongly changing superconducting transition temperatures, stabilising completely new phases, or changing the coupling between charge and spin density waves by symmetry control. A study of the strain-stabilized electronic states in quantum materials is technologically very challenging, requiring ideally in-situ strain tuning and spectroscopic characterization of the electronic states. We recently succeeded in combining atomically resolved spectroscopic imaging of the electronic properties of materials by scanning tunnelling microscopy with in-situ tuning of uniaxial strain. This provides a step change in our capabilities to study the impact of strain on emergent orders and the electronic structure. Combination of the atomic-scale characterization with macroscopic measurements of the properties of the strain stabilized phases will provide new insights into the interplay between the microscopic physics found at the atomic scale and macroscopic properties of the material. It will also enable us to identify new ways to manipulate emergent phases of matter using uniaxial strain.

诸如Spintronics或集成量子传感器之类的未来技术需要不仅具有出色的电子特性，而且还具有复杂的复杂磁性和结构功能。在此类技术中有可能发挥关键作用的一大类化合物是“量子材料”。总体共同点是，这些材料的性质受典型的量子机械现象的控制，例如稳定由电子 - 电子相互作用驱动的许多身体相。这些真正先进的材料的物理学受不同竞争磁性，电荷和轨道自由度之间的强烈相互作用，而新兴现象通常会对我们当前的理解水平构成根本性的挑战。我们建议的核心是，大量竞争或合作的电荷和旋转订单导致量子材料的物理特性极端可调性 - 它们对外部刺激非常敏感。当然，这种敏感性使它们对于需要控制电流，磁性或感知环境参数的应用非常有吸引力。在这里，我们将通过单轴菌株来利用这种可调节性，这是一个关键控制参数，最近受到了越来越多的关注。它通过晶格紧张进行选择性对称性控制的能力在强烈改变过渡温度，稳定全新的相位或通过对称控制之间改变电荷和旋转密度波之间的耦合方面非常成功。对量子材料中应变稳定的电子状态的研究在技术上非常具有挑战性，需要理想的电子状态的原位应变调整和光谱表征。最近，我们通过用单轴菌株的原位调节扫描隧道显微镜，成功地结合了材料电子性质的原子分辨光谱成像。这提供了我们研究应变对紧急订单和电子结构的影响的能力。原子尺度表征与应变稳定相的特性的宏观测量的结合将为在原子量表和材料的宏观特性上发现的微观物理学之间的相互作用提供新的见解。它还将使我们能够使用单轴菌株确定操纵物质新兴阶段的新方法。

项目成果

Elastocaloric determination of the phase diagram of Sr$_2$RuO$_4$

Sr$_2$RuO$_4$相图的弹热测定

• DOI: 10.5445/ir/1000149212
• 发表时间: 2022
• 作者: Li Y

Tuneable electron-magnon coupling of ferromagnetic surface states in PdCoO2

• DOI: 10.1038/s41535-022-00428-8
• 发表时间: 2022-02-11
• 期刊: NPJ QUANTUM MATERIALS
• 影响因子: 5.7
• 作者: Mazzola, F.;Yim, C-M;King, P. D. C.
• 通讯作者: King, P. D. C.

Magnetic-Field Tunable Intertwined Checkerboard Charge Order and Nematicity in the Surface Layer of Sr$_2$RuO$_4$

Sr$_2$RuO$_4$表面层磁场可调交织棋盘电荷顺序和向列性

• DOI: 10.48550/arxiv.2005.00071
• 发表时间: 2020
• 作者: Marques C

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

Constraints on the superconducting state of Sr$_2$RuO$_4$ from elastocaloric measurements

弹热测量对 Sr$_2$RuO$_4$ 超导状态的约束

• DOI: 10.48550/arxiv.2304.07182
• 发表时间: 2023
• 作者: Palle G