MRI: Acquisition of a Multichamber Deposition and Surface Analysis System for Quantum Materials and Device Research

该重大研究仪器奖支持纽约大学的一个项目，以获得一个系统，用于准备和研究不同电子材料之间的界面，以确定新的科学重要的界面现象。所提出的系统结合了多种材料类型的生长以及准备和分析其界面的能力。这将使不同材料之间的界面的发展，不能实现只用一种生长方法或单独的系统。该系统将能够通过使用最适合该材料的技术生长界面的每个组件来制备界面。该项目的一个主要主题是创建和探索具有截然不同的电子特性的材料之间的界面，例如超导体（无能量损失的导电材料），半导体，绝缘体，低维材料和磁性材料。这些材料之间的界面的属性被预测为不同于任何一个组件，这些预测将在实验中进行测试，使该系统成为可能。该项目还将促进对技术应用重要接口的理解。在重要的科学/技术领域培训学生，并向他们提供最先进方法的专门知识，是该项目的一个组成部分。该主要研究仪器奖支持纽约大学收购一个集成的薄膜沉积，表面制备和分析系统，以促进对各种电子材料系统的理解，重点是识别新颖的界面现象和器件物理。所提出的系统结合了多种薄膜生长技术，表面制备和表面分析技术的能力。该系统设计将能够开发新的异质结构，这些异质结构不能仅用一种生长方法或单独的系统或真空室来实现。在相同的超高真空外壳内具有这些能力将使得能够使用最适合于异质结构的每个组件的沉积和样品表面制备技术原位制备所需的界面。该项目的一个主要主题是创建和探索具有竞争电子状态的材料之间的界面，包括拓扑绝缘体，超导体，铁磁体，金属和低维材料。新的电子性质和相位，已在理论上预测将进行实验研究。例子包括拓扑绝缘体表面状态接近传统的对称性破缺量子态，如超导性和铁磁性。当配对时，拓扑相和破缺相的组合被认为是实现诸如马约拉纳费米子、双子和轴子等新颖准粒子态的途径。拓扑绝缘体的表面状态也与薄铁磁层强烈相互作用，导致铁磁体上的自旋转移扭矩刚刚开始探索。其他应用包括有机超导体的研究，其中形成隧道结和栅极结的能力将允许更深入地了解物质的各种电子状态，诱导自旋密度波，超导和量子霍尔相。该项目还将促进对结构和界面因素的理解，这些因素是新型低维半导体技术应用可行性的关键。

This Major Research Instrumentation award support New York University with a project to acquire a system for preparing and studying interfaces between dissimilar electronic materials to identify new scientifically important interface phenomena. The proposed system combines capabilities to grow a variety of material types as well as to prepare and analyze their interfaces. This will enable the development of interfaces between dissimilar materials that could not be achieved with only one growth method or with separate systems. The system will enable the preparation of interfaces by growing each component of the interface with the technique that is most appropriate for that material. A major theme of this project is the creation and exploration of interfaces between materials with vastly different electronic properties, such as superconductors (materials that conduct electricity without energy loss), semiconductors, insulators, low-dimensional materials and magnetic materials. The properties of the interfaces between such materials are predicted to be distinct from that of either component and these predictions will be tested in experiments made possible with this system. The project will also enable advances in understanding of interfaces that are important for technological applications. Training students in important scientific/technological areas and providing them with expertise in state-of-the-art methods is an integral part of this project. This Major Research Instrumentation award supports New York University with the acquisition an integrated thin film deposition, surface preparation and analysis system to advance the understanding of a variety of electronic material systems, with a focus on identifying novel interface phenomena and device physics. The proposed system combines capabilities for multiple thin film growth techniques, surface preparation and surface analysis techniques. The system design will enable the development of new classes of heterostructures that could not be achieved with only one growth method or with separate systems or vacuum chambers. Having these capabilities within the same ultra-high vacuum envelope will enable the preparation of the desired interfaces in situ, using the deposition and sample surface preparation techniques that are most appropriate for each component of a heterostructure. A major theme of this project is the creation and exploration of interfaces between materials with competing electronic states that include topological-insulators, superconductors, ferromagnets, metals and low-dimensional materials. New electronic properties and phases that have been predicted theoretically will be studied experimentally. Examples include topological insulator surface states in proximity with conventional broken symmetry quantum states, such superconductivity and ferromagnetism. When paired, the combination of topological and symmetry-broken phases is thought to provide a route for realizing novel quasiparticle states such as Majorana fermions, Dyons and Axions. Surface states of topological insulators also interact strongly with thin ferromagnetic layers, leading to spin-transfer torques on the ferromagnet that are just beginning to be explored. Other applications include the study of organic superconductors, for which an ability to form tunnel junctions and gate dielectrics will allow a deeper understanding of a variety of electronic states of matter, inducing spin density wave, superconducting and quantum Hall phases. The project will also enable advances in understanding of structural and interface factors that are key to the viability of novel low dimensional semiconductors for technological applications.