Surface/Interface Phenomena and Topological Order in Emerging Quantum Materials

新兴量子材料中的表面/界面现象和拓扑顺序

基本信息

批准号：
1700137
负责人：
Jagadeesh Moodera
金额：
$ 60万
依托单位：
Massachusetts Institute of Technology
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2017
资助国家：
美国
起止时间：
2017-08-01 至 2022-01-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1700137&HistoricalAwards=false
关键词：
Surface Interface Phenomena Topological Order

项目摘要

Non-Technical Abstract:In recent years interest is increasing in a class of emerging new materials called topological insulators (TI) displaying unexpected quantum properties at their surfaces/interfaces. This has led to vast advancement in quantum science, and with potential for future quantum devices that can be energy efficient for information storage and transmission. These new materials can carry current without dissipation and are capable of enhancing the performance in existing technology such as spintronics (used in computer data storage, communication and sensing). Another topology related phenomenon is a new type of quantum state called Majorana bound states (MBS) that can appear in TIs by combining materials with different physical phenomena (topology, superconductivity, magnetism), which may lead to future highly fault-tolerant quantum computing. In this project, students as well as young scientists acquire knowledge and train in many advanced areas, as well as push the frontiers of physics and material science. There is potential to lay the foundation for establishing energy efficient quantum electronics to revolutionize the future information technology. Instruments, patents and knowledge developed during this research would be made available to companies.Technical Abstract:The demonstration of two-dimensional quantum coherent properties and unexpected stabilization of interfacial ferromagnetism to much higher temperatures in TI by proximity coupling to a ferromagnetic insulator, has prompted the investigation: i) to reach the occurrence of quantum coherent properties in a ferromagnetic TI at a higher temperatures, ii) the quantum behavior of spin polarized chiral current in TIs with proximity induced gap when hybridized with a magnetic insulator, and iii) probe unconventional superconducting pairing, the electron spin polarization and quantum coherence in the edge conduction channel of magnetic TI by tunneling spectroscopy. These goals are achievable based on our extensive previous related multidisciplinary knowledge with thin film heterostructure properties using state of the art molecular beam epitaxial system for film growth and measurement facilities, including atomic level characterization of interfaces utilizing the national facilities. Education and training of students (including high school students summer programs) and young scientists in the areas dictated quantum coherent topology driven phenomena are planned under this program.

非技术摘要：近年来，在一类称为拓扑绝缘子（TI）的新材料中，兴趣正在增加，该材料在其表面/接口处显示出意外的量子性能。这导致了量子科学方面的巨大进步，并有可能为信息存储和传输提供节能的未来量子设备的潜力。这些新材料可以随电流而不会消散，并且能够增强现有技术的性能，例如SpinTronics（用于计算机数据存储，通信和传感）。另一种与拓扑相关的现象是一种新型的量子状态，称为MajoraNA BONDAND状态（MBS），可以通过将具有不同物理现象（拓扑，超导性，磁性）的材料组合在TIS中，这可能会导致未来的高度耐断层且耐断层的量子计算。在这个项目中，学生以及年轻的科学家在许多高级领域获得知识和培训，并推动物理和材料科学的前沿。有潜力为建立节能量子电子设备奠定基础，以彻底改变未来的信息技术。在这项研究期间开发的仪器，专利和知识将提供给公司。技术摘要：二维量子相干性能的演示以及界面的铁磁剂的意外稳定，以较高的温度，即通过接近度耦合到铁磁绝缘子，提示研究：i）要在较高温度下达到铁磁Ti中量子相干性能的发生，ii）当用磁绝缘体杂交和iii探针概率不可行时，带有接近性差异的自旋极化手性电流的量子行为与接近诱导的间隙超导配对，通过隧道光谱法在磁Ti边缘传导通道中的电子自旋极化和量子相干性。这些目标是基于我们以前广泛的相关多学科知识来实现的，该知识使用薄膜异质结构的特性，使用最先进的分子束上行式系统，用于膜增长和测量设施，包括利用国家设施的界面表征原子水平的特征。根据该计划，计划了对学生的教育和培训（包括高中生夏季课程）和规定的量子相干拓扑驱动现象的年轻科学家。

项目成果

期刊论文数量（19）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

One compound with two distinct topological states

DOI：
10.1038/s41563-020-0628-5
发表时间：
2020-02-13
期刊：
NATURE MATERIALS
影响因子：
41.2
作者：
Wei, Peng;Moodera, Jagadeesh S.
通讯作者：
Moodera, Jagadeesh S.

Charge transport through spin-polarized tunnel junction between two spin-split superconductors

DOI：
10.1103/physrevb.100.184501
发表时间：
2019-11-04
期刊：
PHYSICAL REVIEW B
影响因子：
3.7
作者：
Rouco, Mikel;Chakraborty, Subrata;Sebastian Bergeret, F.
通讯作者：
Sebastian Bergeret, F.

Modulation Doping via a Two-Dimensional Atomic Crystalline Acceptor

DOI：
10.1021/acs.nanolett.0c03493
发表时间：
2020-12-09
期刊：
NANO LETTERS
影响因子：
10.8
作者：
Wang, Yiping;Balgley, Jesse;Burch, Kenneth S.
通讯作者：
Burch, Kenneth S.

Hypergiant spin polarons photogenerated in ferromagnetic europium chalcogenides

铁磁铕硫属化物中光生超巨自旋极化子

DOI：
10.1063/1.5143311
发表时间：
2020
期刊：
Applied Physics Letters
影响因子：
4
作者：
Gratens, X.;Ou, Yunbo;Moodera, J. S.;Rappl, P. H.;Henriques, A. B.
通讯作者：
Henriques, A. B.

Signature of a pair of Majorana zero modes in superconducting gold surface states

DOI：
10.1073/pnas.1919753117
发表时间：
2020-04-21
期刊：
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
影响因子：
11.1
作者：
Manna, Sujit;Wei, Peng;Moodera, Jagadeesh S.
通讯作者：
Moodera, Jagadeesh S.