Bosonic Condensation and Emergent Phenomena in 2D Janus layers and Moiré Lattices

二维 Janus 层和莫尔晶格中的玻色子凝聚和涌现现象

• 批准号: 2111812
• 负责人: Sefaattin Tongay
• 金额: $ 55.74万
• 依托单位: Arizona State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-06-01 至 2025-05-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2111812&HistoricalAwards=false
• 关键词: Bosonic; Condensation; Emergent; Phenomena; 2D

Non-Technical AbstractRecently discovered Janus materials are a new class of ultra-thin crystals. Here, the name ''Janus'' comes from the ancient Roman God of beginnings and transitions with two faces one looking to the future while the other facing to the past. Like Janus himself, Janus materials have top and bottom faces made of different atoms. This unique atomic arrangement brings promising optical properties towards next-generation quantum technologies, especially, if one manages strong interaction between materials and light. This project aims to discover new quantum properties by encapsulating these materials within a special mirror, a Bragg reflector, designed to trap light and achieve strong light-material interaction. While doing so, an innovative educational plan is proposed to train the undergraduate and high school students in an active research environment to create next-generation science and engineering workforce. In parallel, the educational plan introduces ‘Living in a Materials World’ outreach activity to stimulate and prepare K12 students for careers in sciences and engineering through monthly and quarterly online and in-person lab tours, demonstration, and tutorial events.Technical AbstractRecent studies have demonstrated exciton-polaritons in two-dimensional excitonic dichalcogenides. These bosonic quasi-particles have highly appealing properties and functionalities that are not accessible with excitons alone. Exciting new material properties are possible if the density of exciton-polaritons is sufficiently increased to form polariton Bose condensates. Here, owing to the presence of colossal dipole moment and dipolar excitons, Janus layers offer extended exciton lifetimes, exotic valley-physics, and non-linear properties that are ideal for reaching this quantum regime. As such, this project first aims to stabilize exciton-polaritons in the strong-coupling regime by encapsulating 2D Janus layers in designer high-Q factor microcavities. Systematic studies next aim to demonstrate Bose polariton condensates in the high-density regime and establish their quantum properties. Lastly, the research team investigates the formation of topological excitons, controls the super-radiant phase formation, and explores new regimes of Bose-Hubbard physics by using their Moiré lattices and tuning its potential landscape. Once completed, the introduced Janus and Moiré exciton-polaritons, polariton condensates, and topological excitons are anticipated to fill a large fundamental knowledge gap in the field. Potential societal impacts include high-temperature polaritonic lasers and new quantum information devices as well as educational training activities for high school and undergraduate students.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.

非技术性的抽象材料是一种新的超薄晶体。原子。为了在一个积极的环境中培训地下和高级学生，以创建下一代劳动力。每月和季度的在线和面对面的实验室实验室旅行，示范和教程活动。技术抽象的研究表明，在二维激烈的激子中，这些波斯型颗粒具有极具吸引力的功能。材料特性是可以提供XCITON的XCITON的激子层的密度旨在通过在ER高Q-Q因子微腔中封装2D Janus层来稳定激子耦合方案。形成拓扑激素，控制超级式的ormation，并使用tubbares lattices探索新的bose-hubbard物理，并调整其潜在的景观。在E领域，高中和本科生。

项目成果

Mapping the dispersion of the occupied and unoccupied band structure in photoexcited 1T-TiSe2

• DOI: 10.1016/j.jpcs.2022.110740
• 发表时间: 2022-04
• 期刊: Journal of Physics and Chemistry of Solids
• 影响因子: 4
• 作者: Maximilian Huber;Y. Lin;N. Dale;R. Sailus;S. Tongay;R. Kaindl;A. Lanzara

Intrinsic circularly polarized exciton emission in a twisted van der Waals heterostructure

• DOI: 10.1103/physrevb.105.l241406
• 发表时间: 2021-05
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: J. Michl;C. Palekar;S. A. Tarasenko;F. Lohof;C. Gies;M. von Helversen;R. Sailus;S. Tongay;T. Taniguchi;K. Watanabe;T. Heindel;B. Rosa;M. Rödel;T. Shubina;S. Höfling;S. Reitzenstein;C. Anton-Solanas;C. Schneider

The phononic and charge density wave behavior of entire rare-earth tritelluride series with chemical pressure and temperature

• DOI: 10.1063/5.0110395
• 发表时间: 2022-11
• 期刊: APL Materials
• 影响因子: 6.1
• 作者: K. Yumigeta;Y. Attarde;J. Kopaczek;M. Sayyad;Yuxia Shen;Mark Blei;Seyed Tohid Rajaei Moosavy;Ying Qin;R. Sailus;S. Tongay

Tunable magnetic and optical properties of transition metal dihalides by cation alloying

• DOI: 10.1103/physrevmaterials.6.084003
• 发表时间: 2022-08
• 期刊: Physical Review Materials
• 影响因子: 3.4
• 作者: Mark Blei;Jesse Kapeghian;Rounak Banerjee;P. Kolari;Blake Povilus;Y. Attarde;A. Botana;S. Tongay

Imaging two-dimensional generalized Wigner crystals

• DOI: 10.1038/s41586-021-03874-9
• 发表时间: 2021-09-30
• 期刊: NATURE
• 影响因子: 64.8
• 作者: Li, Hongyuan;Li, Shaowei;Wang, Feng
• 通讯作者: Wang, Feng