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

MRI：获取用于量子材料和器件研究的多室沉积和表面分析系统

• 批准号: 1531664
• 负责人: Andrew Kent
• 金额: $ 150万
• 依托单位: New York University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-09-01 至 2020-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1531664&HistoricalAwards=false
• 关键词: MRI; Acquisition; Multichamber; Deposition; Surface

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.

这一重大研究仪器奖支持纽约大学的一个项目，即获得一个系统，用于准备和研究不同电子材料之间的界面，以识别新的具有重要科学意义的界面现象。拟议的系统结合了生长各种材料类型以及准备和分析它们的界面的能力。这将使不同材料之间的界面得以发展，而这些界面不是仅用一种生长方法或用单独的系统就能实现的。该系统将通过用最适合该材料的技术生长界面的每个组件来使界面的准备工作成为可能。该项目的一个主要主题是创造和探索具有巨大不同电子性质的材料之间的界面，例如超导体(导电而不损失能量的材料)、半导体、绝缘体、低维材料和磁性材料。这些材料之间的界面性质被预测为与任何一种成分的界面性质不同，这些预测将在使用该系统的实验中得到验证。该项目还将促进对接口的理解，这些接口对技术应用非常重要。在重要的科学/技术领域对学生进行培训，并向他们提供最先进的方法方面的专门知识，是该项目不可分割的一部分。这一重大研究仪器奖支持纽约大学收购一种集成的薄膜沉积、表面准备和分析系统，以促进对各种电子材料系统的了解，重点是识别新的界面现象和器件物理。建议的系统结合了多种薄膜生长技术、表面准备和表面分析技术的能力。该系统设计将能够开发出仅用一种生长方法或单独的系统或真空室无法实现的新类型的异质结构。在相同的超高真空封套内拥有这些能力，将能够使用最适合异质结构每一组分的沉积和样品表面制备技术，在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态的材料之间的界面，这些材料包括拓扑绝缘体、超导体、铁磁体、金属和低维材料。理论上预测的新的电子性质和相将被实验研究。例如，拓扑绝缘体表面态与传统的破缺对称量子态接近，例如超导和铁磁性。当配对时，拓扑相和对称性破缺相的组合被认为为实现新的准粒子状态提供了一条途径，如Majorana费米子、双子和轴子。拓扑绝缘体的表面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才刚刚开始被探索。其他应用包括有机超导体的研究，对于有机超导体，形成隧道结和栅电介质的能力将使人们能够更深入地了解物质的各种电子态，引发自旋密度波、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，这些因素是用于技术应用的新型低维半导体生存能力的关键。

项目成果

An Electrochemical Biochip for Measuring Low Concentrations of Analytes With Adjustable Temporal Resolutions

• DOI: 10.1109/tbcas.2020.3009303
• 发表时间: 2020-07
• 期刊: IEEE Transactions on Biomedical Circuits and Systems
• 影响因子: 5.1
• 作者: Kae-Dyi You;Edoardo Cuniberto;Shao-Cheng Hsu;Bohan Wu;Zhujun Huang;Xiaochang Pei;D. Shahrjerdi

Versatile construction of van der Waals heterostructures using a dual-function polymeric film

• DOI: 10.1038/s41467-020-16817-1
• 发表时间: 2020-06-15
• 期刊: NATURE COMMUNICATIONS
• 影响因子: 16.6
• 作者: Huang, Zhujun;Alharbi, Abdullah;Shahrjerdi, Davood
• 通讯作者: Shahrjerdi, Davood

Nano-engineering the material structure of preferentially oriented nano-graphitic carbon for making high-performance electrochemical micro-sensors

• DOI: 10.1038/s41598-020-66408-9
• 发表时间: 2020-06-10
• 期刊: SCIENTIFIC REPORTS
• 影响因子: 4.6
• 作者: Cuniberto, Edoardo;Alharbi, Abdullah;Shahrjerdi, Davood
• 通讯作者: Shahrjerdi, Davood