An electronbeam evaporator for realtime and precise flux control for molecular beam epitaxy

用于分子束外延实时精确通量控制的电子束蒸发器

• 批准号: RTI-2022-00382
• 负责人: Sawatzky, George
• 金额: $ 10.66万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=741830
• 关键词: electronbeam; evaporator; realtime; precise; flux

This proposal is for the purchase of an electron-beam (e-beam) evaporator that will be used as an add-on to the molecular beam epitaxy (MBE) and angle-resolved photoemission spectroscopy (ARPES) cluster located in Stewart Blusson Quantum Matter Institute (SBQMI) at UBC. The cluster tool is the central infrastructure of the Quantum Materials and Devices Foundry (QMDF), designed to tackle the most challenging questions in engineered quantum material systems. The proposed evaporator is necessary for depositing high-melting temperature 4d and 5d refractory metals that are essential in topological materials, such as WTe2 and SrIrO3, because they introduce strong spin-orbit coupling into the electronic structure. We aim to build a world¬-class research program that has the ability to routinely design, induce, and control new properties and functionalities, such as superconductivity and topologically protected states, in transition¬ metal chalcogenides and oxides and other novel two¬-dimensional materials systems. These goals underlie many of the core research directives currently in vigor at SBQMI. The major obstacle to MBE growth of materials containing elements such as Ta, Ru, Ir and Mo is the metals' intrinsically unstable evaporation rates at the required high temperatures (~2500°C). The evaporator, and our innovative application of in situ electron diffraction developed at QMDF, solves this critical issue and provides a versatile approach to guarantee perfect stoichiometry. With the possibility of stabilizing new phases containing refractory metals, we aim to achieve major breakthroughs in the synthesis of quantum materials. Research on new materials and devices has been supporting the rapid economic growth of Canada with technological innovations for example in semiconductor industries in the past, and new quantum materials are key to Canada's roadmap for quantum technologies in the future. QMDF's research program will be central to HQP training. With its emphasis on complex materials, nanoscience, MBE, and advanced spectroscopy, of strategic importance to UBC and Canada, the QMDF plays a key role in HQP training. The acquisition of the e-beam evaporator for the MBE + ARPES cluster will offer HQP access to a unique suite of highly-specialized infrastructure, providing training in critical skills for both research and industry.

该建议是用于购买电子束（E梁）蒸发器的分子束外延（MBE） - 分子光发射光谱（ARPES）集群，位于Stewart Blusson量子量研究所（SBQMI）中。量子材料和设备铸造厂（QMDF）的中央基础设施旨在解决工程量子材料系统中最具挑战性的问题。 WTE2和SRIRO3，他们将强的自旋轨道耦合引入了电子结构，我们旨在建立世界一流的研究计划，以常规设计，诱导和控制新的特性和功能，例如超导性和拓扑保护器，在过渡金属炭氧化物和其他新型的二维材料系统中需要D高温（〜2500°C）。量子材料的合成中的主要突破。和高级光谱，对MBE + ARPES群集的UBC和加拿大电子束蒸发器具有战略重要性，将为HQP访问一套独特的高度专业基础设施，为研究和行业提供关键技能的培训。