Chiral Strain Engineering of Polar Semiconductors

极性半导体的手性应变工程

• 批准号: 2312944
• 负责人: Jian Shi
• 金额: $ 42.52万
• 依托单位: Rensselaer Polytechnic Institute
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-09-01 至 2026-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2312944&HistoricalAwards=false
• 关键词: Chiral; Strain; Engineering; Polar; Semiconductors; Chiral; Strain; Engineering; Polar; Semiconductors

Nontechnical descriptionChirality, a concept that describes objects (such as crystals, molecules, or the relationship between electron spin and momentum) that possess a distinct configuration from their mirror image, plays a pivotal role in driving many fundamental phenomena in materials physics. Crystalline chiral solids exhibit a unique spin-momentum relation and robust chiral-induced spin selectivity, making them highly promising for energy-efficient spintronic computing at room temperature. The proposed approach of chiral elastic strain engineering offers a framework that facilitates the exploration and discovery of new chiral materials and phases. This approach not only enables the enriching of basic understanding of chiral electronic properties and their relations with strain, but also has the potential to accelerate the implementation of chiral materials in future spintronics and computing technologies. This award also aims to promote science and engineering education and research training among a diverse range of students, including those from historically underrepresented groups in the field, on the topic of chiral electronic materials. The results gained from this award will contribute to the advancement of future microelectronics, benefiting the overall societal progress of the United States.Technical descriptionChiral spin-orbit coupling, observed in the surface states of topological insulators, Weyl semimetals, and Rashba/Dresselhaus crystals/systems, plays a crucial role in the design of emerging photonic and spintronic devices for integrated quantum photonics and electronics. Chiral crystals, featuring Kramers-Weyl chiral spin-orbit coupling, can be either metals or insulators, providing a larger energy window for topologically non-trivial behavior compared to topological insulators or Weyl semimetals. Moreover, robust room temperature chiral-induced spin selectivity has been discovered in chiral materials. However, the availability of crystalline chiral semiconductors is limited, which significantly hinders the selection of suitable model systems for studying Kramers-Weyl physics, chiral electronic transport properties, and the development of spintronic devices based on chiral materials. In this project, the principal investigator proposes to utilize elastic strain to transform non-chiral semiconductors into chiral phases that possess topological chiral electronic structures. The goal is to uncover the fundamental relationship between chiral properties and strain fields. The role of electric fields in switching chiral handedness will also be investigated. This project will advance the fundamental understanding of chiral electronic structures, electronic transport, optical and optoelectronic properties, and will expand the materials database concerning chiral spintronic properties and devices for future computing.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

非技术描述的病毒，一个描述对象（例如晶体，分子或电子旋转和动量之间的关系）的概念，它们具有与其镜像相同的构型，在推动材料物理学的许多基本现象中起着关键作用。晶体手性固体具有独特的自旋摩托明关系和强大的手性诱导的自旋选择性，这使得它们对于室温下的节能旋转计算非常有前途。拟议的手性弹性应变工程方法提供了一个框架，可促进探索和发现新的手性材料和相位。这种方法不仅可以丰富对手性电子特性及其与菌株的关系的基本了解，而且有可能加速在未来的Spintronics和Computing技术中的手性材料的实施。该奖项还旨在促进各种学生的科学和工程教育和研究培训，包括该领域历史上代表性不足的群体的学生，关于手性电子材料的话题。从该奖项中获得的结果将有助于进步未来的微电子，从而使美国的整体社会进步受益。技术描述在拓扑绝缘子，Weyl Semimetals，Semimetals和Rashba/rashba/drastelhaus crystals/Systems，在potem intermon中扮演了potem-septon and semoning anding anding semoning的旋转状态，在拓扑绝缘子的表面状态下观察到，在电子产品。手性晶体具有Kramers-Weyl手性旋转轨道耦合，可以是金属或绝缘子，与拓扑绝缘子或WEYL半含量相比，为拓扑上的非平凡行为提供了更大的能量窗口。此外，在手性材料中发现了强大的室温手性诱导的自旋选择性。然而，晶体手性半导体的可用性受到限制，这极大地阻碍了选择用于研究Kramers-Weyl物理学，手性电子传输特性的合适模型系统以及基于手性材料的Spintronic设备的开发。在该项目中，主要研究者建议利用弹性应变将非手力学半导体转化为具有拓扑性手性电子结构的手性相。目的是揭示手性特性与应变场之间的基本关系。还将研究电场在切换手势方面的作用。该项目将提高对手性电子结构，电子传输，光学和光电特性的基本了解，并将扩展有关手性旋转特性和未来计算的材料数据库。该奖项反映了NSF的法规任务，并被认为是通过基金会的知识优点和广泛的范围来评估的，并且值得通过评估来进行评估。