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: $ 12.38万
• 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: 2013
• 资助国家: 加拿大
• 起止时间: 2013-01-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=522836
• 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计划进行，该计划将大块晶体和薄膜的高度受控生长的开发与最先进的光谱测量相结合。作为世界领先的材料开发团队，我们能够研究极高纯度的样品，揭示材料的内在电子性质，并为通过受控的杂质取代来操纵它们提供基础。通过高纯晶体生长开发的主要材料是基于铜氧化物的高温超导体，以及基于层状砷化铁的最新高温超导体家族。这些高纯度晶体为众多加拿大科学家的研究提供了便利，也为我们自己在电子性质方面的工作提供了便利。我们自己的测量侧重于两种不同的光谱技术。第一种是微波测量，用来测量超导电子的密度，以及超导基态外的低能激发。我们最新的进展是在这套实验技术中增加了扫描隧道光谱。新的扫描探头设备在加拿大是独一无二的，它提供了一个超低振动环境，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性质。