Understanding the Hinge Modes in a Topological Superconductor

了解拓扑超导体中的铰链模式

• 批准号: 2003343
• 负责人: Kenneth Burch
• 金额: $ 55.4万
• 依托单位: Boston College
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-08-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2003343&HistoricalAwards=false
• 关键词: Understanding; Hinge; Modes; Topological; Superconductor

Non-Technical Abstract:In recent years a new kind of phase of matter has been predicted, called a Higher Order topological state. This state contains specific new modes on intersections of different surfaces of the crystal. These so-called "hinge" or "corner" modes have the potential to form the basis of future topological quantum computers, immune to errors and able to perform calculations currently unthinkable. An exciting example of such materials is FeTeSe, where the PI provided the first evidence that it is a higher order topological superconductor. Using expertise in fabrication, electrical, and optical spectroscopy, the PI will develop new means to probe the properties of the hinge modes in FeTeSe systematically. The topics and techniques also provide an excellent starting point for creating public talks and recruiting a diverse set of trainees, undergraduate and graduate students, who also participate in public outreach. The project's participants gain valuable professional skills in: collaboration, computation, fabrication, and characterization. Technical Abstract:Higher order topological phases have recently emerged, with boundary modes in two or more dimensions smaller than the bulk. These are systems whose boundary states are themselves topological, gapped with different signs. Using his expertise in fabrication, electrical, and optical spectroscopy, the PI will develop new means to probe the properties of the hinge modes in FeTeSe. An array of contact configurations and protocols will determine the best method to isolate the hinge from the bulk. This effort is aided by photothermal measurements to image the hinges. Careful studies of the effects of magnetic fields and magnetic contacts will determine the details of spin momentum locking. The studies will reveal the transport, thermal, and spin-momentum locking of the hinge modes. As such, their robustness will be directly probed, along with determining the proper ground-state Hamiltonian to describe the hinges.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.

非技术摘要：近年来，人们预言了一种新的物质相，称为高阶拓扑态。这种状态包含晶体不同表面的交点上的特定新模式。这些所谓的“铰链”或“角”模式有可能构成未来拓扑量子计算机的基础，不受错误的影响，并能够执行目前无法想象的计算。这类材料的一个令人兴奋的例子是FeTeSe，其中PI提供了第一个证据，证明它是一种更高阶拓扑超导体。利用制造、电学和光学光谱方面的专业知识，PI将开发新的方法来系统地探索FeTeSe中铰链模式的性质。这些主题和技巧也为创建公开演讲和招募不同的实习生提供了一个很好的起点，这些实习生包括本科生和研究生，他们也参与公共宣传。该项目的参与者在以下方面获得了宝贵的专业技能：协作、计算、制造和表征。技术摘要：最近出现了高阶拓扑相，二维或更多维的边界模小于体模。这些系统的边界状态本身就是拓扑的，中间有不同的符号。利用他在制造、电学和光学光谱方面的专业知识，PI将开发新的方法来探测FeTeSe中铰链模式的特性。一系列触点配置和协议将确定将铰链与整体隔离的最佳方法。这项工作得到了对铰链成像的光热测量的帮助。仔细研究磁场和磁接触的影响将确定自旋动量锁定的细节。这些研究将揭示铰链模的输运、热和自旋-动量锁定。因此，将直接探讨它们的稳健性，并确定适当的基态哈密顿量来描述铰链。这一奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Dynamical Anyon Generation in Kitaev Honeycomb Non-Abelian Spin Liquids

Kitaev 蜂窝非阿贝尔自旋液体中的动态任意子生成

• DOI: 10.1103/physrevlett.129.037201
• 发表时间: 2022
• 期刊: Physical Review Letters
• 影响因子: 8.6
• 作者: Liu, Yue;Slagle, Kevin;Burch, Kenneth S.;Alicea, Jason
• 通讯作者: Alicea, Jason

Layer Hall effect in a 2D topological axion antiferromagnet

• DOI: 10.1038/s41586-021-03679-w
• 发表时间: 2021-07-22
• 期刊: NATURE
• 影响因子: 64.8
• 作者: Gao, Anyuan;Liu, Yu-Fei;Xu, Su-Yang
• 通讯作者: Xu, Su-Yang

Dynamically preferred state with strong electronic fluctuations from electrochemical synthesis of sodium manganate

锰酸钠电化学合成具有强电子波动的动态优选状态

• DOI: 10.1016/j.matt.2021.12.012
• 发表时间: 2022
• 期刊: Matter
• 影响因子: 18.9
• 作者: Chen, Xi;Wang, Yichao;Wang, Yiping;Dally, Rebecca L.;Wiaderek, Kamila;Qiao, Tianyu;Liu, Jue;Hu, Enyuan;Burch, Kenneth;Lynn, Jeffrey W.
• 通讯作者: Lynn, Jeffrey W.

Signatures of non-Loudon-Fleury Raman scattering in the Kitaev magnet β−Li2IrO3

Kitaev 磁体 βLi2IrO3 中非劳登-弗勒里拉曼散射的特征

• DOI: 10.1103/physrevb.105.l241101
• 发表时间: 2022
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: Yang, Yang;Wang, Yiping;Rousochatzakis, Ioannis;Ruiz, Alejandro;Analytis, James G.;Burch, Kenneth S.;Perkins, Natalia B.
• 通讯作者: Perkins, Natalia B.

Axial Higgs mode detected by quantum pathway interference in RTe3

• DOI: 10.1038/s41586-022-04746-6
• 发表时间: 2021-12
• 期刊: Nature
• 影响因子: 64.8
• 作者: Yiping Wang;Ioannis Petrides;G. McNamara;Md Mofazzel Hosen;Shiming Lei;Yueh-Chun Wu;J. Hart;H. Lv;Jun Yan;Di Xiao;J. Cha;P. Narang;L. Schoop;K. Burch