Crystal growth and spectroscopy of novel materials

新型材料的晶体生长和光谱学

• 批准号: 170825-2013
• 负责人: Bonn, Douglas
• 金额: $ 5.83万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Group
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=633528
• 关键词: Crystal; growth; spectroscopy; novel; materials

Research in quantum materials will be carried out with an integrated program that combines the development of highly controlled growth of bulk crystals and thin films, with state-of-the-art spectroscopic measurements. As a world-leading group in materials development, we are able to study samples of exceptionally high purity, revealing the intrinsic electronic properties of materials and provide a basis for manipulating them with controlled impurity substitutions. The main materials being developed through high purity crystal growth are the high temperature superconductors based on copper oxides, and the newest family of high temperature superconductors built on layered iron arsenides. These high purity crystals facilitate the research of numerous Canadian scientists, as well as our own work on electronic properties. Our own measurements focus on two different spectroscopic techniques. The first of these is microwave measurements which are used to measure the density of superconducting electrons, as well as the low energy excitations out of the superconducting ground state. Our most recent advance is the addition of scanning tunneling spectroscopy to this suite of experimental techniques. The new scanning probe facility is unique in Canada, offering an ultra-low vibration environment that allows us to study the electronic properties on the surface of a material, at low temperatures, in high magnetic field, and with atomic resolution.

量子材料的研究将通过一个综合项目进行，该项目将高度控制的块状晶体和薄膜生长的发展与最先进的光谱测量相结合。作为材料开发领域的世界领先集团，我们能够研究极高纯度的样品，揭示材料的固有电子特性，并为通过受控杂质替代来操纵它们提供基础。通过高纯度晶体生长开发的主要材料是基于氧化铜的高温超导体，以及基于层状铁砷化物的最新高温超导体家族。这些高纯度晶体促进了许多加拿大科学家的研究，以及我们自己对电子特性的研究。我们自己的测量集中在两种不同的光谱技术。其中第一个是微波测量，用于测量超导电子的密度，以及超导基态的低能激发。我们最近的进展是增加了扫描隧道光谱这套实验技术。新的扫描探针设施在加拿大是独一无二的，它提供了一个超低振动的环境，使我们能够在低温、高磁场和原子分辨率下研究材料表面的电子特性。