Transition Metal Oxides: Emergent Phases and Interfaces

过渡金属氧化物：涌现相和界面

• 批准号: RGPIN-2016-06337
• 负责人: Paramekanti, Arun
• 金额: $ 3.64万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=690202
• 关键词: Transition; Metal; Oxides; Emergent; Phases

What principles govern the organization of electrons in a crystalline solid? Can we control the organization and dynamics of electrons? How thin can we make a superconductor and still retain its superconducting properties? Can superconductivity emerge at the nanoscale interface between two different crystals? Can light-matter interaction lead to new optically-induced electronic states in solids? Can these states lead to new types of photovoltaics? Making progress on such fundamental issues is the key to synthesizing nanoscale devices, and creating new energy and communication technologies, both of which are expected to be of immense benefit to Canada.***In simple crystalline solids, the organization of electrons is governed by the fundamental laws of quantum mechanics, together with quantum statistics encoded in the Pauli principle. However, when strong electron interactions become important, the electrons can organize in entirely new ways, giving rise to remarkable new properties such as high temperature superconductivity, colossal magnetoresistance, or liquid crystalline order. Transition metal oxides are complex materials which provide a canonical example of such emergent quantum behavior, with a slew of applications ranging from low power loss transmission lines, to solid state drives, oxide catalysts, and novel photovoltaics. The long-term objective of this research programme is to acquire fundamental knowledge about the quantum behavior of electrons in crystalline transition metal oxides, with potential long-term economic benefits to Canadian society.***This proposal focuses on two intertwined strands of research. The first strand deals with the theoretical study of bulk transition metal oxides containing heavy transition metals. Understanding how the strong spin-orbit coupling in these elements impacts properties such as superconductivity, magnetism, and electron transport, is the key goal, which is of great importance in a broad class of multifunctional oxides. The second strand of the proposed research deals with the theoretical study of interfaces or quantum wells of transition metal oxides, which can shed light on ultrathin correlated materials. The research programme will establish fundamental milestones in oxide physics, and set the stage for future investigations of complex quantum materials.**

哪些原理控制着晶体固体中电子的组织？我们可以控制电子的组织和动态吗？我们可以制造超导体并仍然保留其超导性能？可以在两个不同晶体之间的纳米级界面上出现超导性吗？轻度 - 互动可以导致固体中新的光学诱导的电子状态吗？这些状态可以导致新型的光伏类型吗？在此类基本问题上取得进展是合成纳米级设备的关键，并创建新的能源和通信技术，这两种技术都有望对加拿大带来巨大的好处。***在简单的结晶固体中，电子的组织受量子力学的基本定律，以及保利原理中编码的量子统计。但是，当强烈的电子相互作用变得重要时，电子可以以全新的方式组织，从而产生显着的新特性，例如高温超导性，巨大的磁性或液晶级。过渡金属氧化物是复杂的材料，提供了这种新兴量子行为的规范示例，从低功率损耗传输线到固态驱动器，氧化物催化剂和新型光伏型，多种应用。该研究计划的长期目标是获取有关晶体过渡金属氧化物中电子的量子行为的基本知识，并为加拿大社会带来了潜在的长期经济利益。第一条链介绍了含有重金属的大量过渡金属氧化物的理论研究。关键目标是了解这些元素中强的自旋轨道耦合如何影响超导性，磁性和电子传输等特性，这在广泛的多功能氧化物中非常重要。拟议的研究的第二条涉及过渡金属氧化物的界面或量子孔的理论研究，这些研究可能会揭示超薄相关材料。该研究计划将在氧化物物理学中建立基本里程碑，并为将来对复杂量子材料进行研究奠定了基础。**