Studying dynamic control of quantum heterostructure interfaces with strain pulses

研究应变脉冲量子异质结构界面的动态控制

• 批准号: 580944-2022
• 负责人: Beyerlein, KennethRoyKR
• 金额: $ 1.82万
• 依托单位: Institut national de la recherche scientifique
• 依托单位国家: 加拿大
• 项目类别: Alliance Grants
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=752623
• 关键词: Studying; dynamic; control; quantum; heterostructure

The proposed project initiates a collaboration between Prof. Kenneth Beyerlein of INRS-EMT and Prof. Ankit Disa of Cornell University, to explore the dynamic properties of quantum interfaces. Quantum interfaces can exhibit novel electronic states, such as superconductivity, which are not found in either material individually. Precision thin film fabrication methods like molecular beam epitaxy can bring together a wide range of materials to tune the interaction of materials across such boundaries and realize a multitude of correlated states. The proposed project takes the next step by exploring how the interaction can also be tuned dynamically by exciting the atomic or electronic structure of one of the materials. This is a largely unexplored avenue of interfacial control, which can lead to new quantum states that are not realizable in equilibrium. Specifically, we seek to use ultrafast transmission electron microscopy measurements to study how strain pulses travelling from a MgO substrate to a BaTiO3 film influence the ferroelectric order near the interface. Funds are requested to cover fees associated with the personnel, travel and user fees of this experiment. This is the beginning of a collaboration that has the goal to define new and interesting directions to realize and characterize functional quantum materials.

该项目启动了INRS-EMT的Kenneth Beyerlein教授和康奈尔大学的Ankit Disa教授之间的合作，以探索量子界面的动态特性。量子界面可以表现出新的电子状态，例如超导性，这在任何一种材料中都没有发现。像分子束外延这样的精密薄膜制造方法可以将各种各样的材料聚集在一起，以调整材料在这种边界上的相互作用，并实现多种相关状态。该项目的下一步是探索如何通过激发其中一种材料的原子或电子结构来动态调整相互作用。这是一个很大程度上尚未探索的界面控制途径，它可以导致新的量子态，而这些量子态在平衡状态下是不可实现的。具体而言，我们试图使用超快透射电子显微镜测量研究如何应变脉冲从MgO基板的钛酸钡薄膜影响界面附近的铁电秩序。要求提供资金，以支付这项试验的人事费、差旅费和使用费。这是一项合作的开始，其目标是定义新的和有趣的方向，以实现和表征功能量子材料。