Investigation of Nonequilibrium States and Photoinduced Transitions in Topological Superlattices

拓扑超晶格中非平衡态和光致跃迁的研究

基本信息

  • 批准号:
    2247363
  • 负责人:
  • 金额:
    $ 64.72万
  • 依托单位:
  • 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:
    2023-05-01 至 2026-04-30
  • 项目状态:
    未结题

项目摘要

Nontechnical description: This project investigates new ways of manipulating quantum materials with ultrashort laser pulses, which can have a significant impact on developing energy-efficient future technologies. The material of interest is a thin film made up of alternating layers of two types of complex oxides that exhibit different electric polarization properties but are structurally similar. The resulting thin film has a highly periodic pattern of polarization domains with typical sizes in the range of 10 nanometers. By shining laser pulses on the material, the investigators dynamically modify the spatial order of these patterns. Studying the temporal evolution of these patterns by stroboscopic measurements with a temporal resolution fast enough to observe electron movements provides an understanding of the underlying mechanisms of pattern formation. Finding routes to optically control polarization patterns could have far-reaching applications. These patterns can encode information that can be rapidly changed by light. This reduces the amount of energy used compared to conventional electronics while enabling many orders of magnitude faster switching in non-volatile memories or computation devices. This project includes educational activities aimed at training the next generation of scientists and engineers at the interface between physics, chemistry, and materials science. These activities will engage with K-12 students, undergraduate and graduate students, and other members of the community to promote diversity in STEM fields and provide valuable training opportunities.Technical description: This project investigates nonequilibrium states and photoinduced transitions in topological superlattices. The research focuses on a ferroelectric/paraelectric heterostructure composed of alternating strontium titanate and lead titanate layers (STO-PTO). These heterostructures exhibit a variety of topological arrangement of local electric polarization forming long-range orders of polar vortices and skyrmions near equilibrium. While traditional tuning knobs like composition, strain, and temperature only affect near-equilibrium properties, rapid improvements in ultrafast laser technology presents a new opportunity to dynamically manipulate these spatially-complex polarization properties. Ultrafast pump-probe schemes specific to parts of the intrinsically complex STO-PTO system is used to investigate the temporal evolution of out-of-equilibrium phases and local topology. Novel experimental tools, including ultrafast broadband extreme-ultraviolet absorption spectroscopy (UBXAS) and extreme ultraviolet second harmonic generation (XUV-SHG), are used to measure superlattice order parameters, trace energetic relaxation processes following photoexcitation, and detect proximitized broken-symmetry states at the interface in real-time. Ultrafast electron microscopy (UEM) is applied to unravel real-space dynamics of the polar skyrmion order and the impact of topological defects on long-range order. The project provides novel insights into interface and defect-mediated correlations in mesoscale systems.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:该项目研究用超短激光脉冲操纵量子材料的新方法,这将对开发未来的节能技术产生重大影响。感兴趣的材料是由两种类型的复合氧化物交替层组成的薄膜,这两种复合氧化物表现出不同的电极化性质,但结构相似。得到的薄膜具有高度周期性的极化磁区图案,典型的尺寸在10纳米范围内。通过将激光脉冲照射到材料上,研究人员动态地修改了这些图案的空间顺序。通过以足够快的时间分辨率观察电子运动的频闪测量来研究这些图案的时间演变,有助于理解图案形成的潜在机制。寻找光学控制偏振模式的途径可能会有深远的应用。这些图案可以编码可以被光快速改变的信息。与传统电子设备相比,这减少了能量使用量,同时在非易失性存储器或计算设备中实现了许多数量级的切换。该项目包括旨在培养物理、化学和材料科学之间的下一代科学家和工程师的教育活动。这些活动将与K-12学生、本科生和研究生以及社区的其他成员接触,以促进STEM领域的多样性并提供宝贵的培训机会。技术描述:本项目研究拓扑超晶格中的非平衡态和光诱导跃迁。重点研究了由钛酸锶和钛酸铅交替层组成的铁电/顺电异质结(STO-PTO)。这些异质结构呈现出不同的局域电极化拓扑排列,形成了近平衡的极涡和天子长程序。虽然传统的调谐旋钮,如成分、应变和温度只影响近平衡性质,但超快激光技术的快速发展为动态操纵这些空间复杂的偏振性质提供了新的机会。采用针对部分复杂的STO-PTO系统的超快泵浦-探测方案,研究了非平衡相的时间演化和局域拓扑。超快宽带极紫外吸收光谱(UBXAS)和极紫外二次谐波产生(XUV-SHG)等新的实验手段被用来测量超晶格有序参数,跟踪光激发后的能量弛豫过程,并实时检测界面上的近似性破缺对称态。用超快电子显微镜(UEM)研究了极区Skyrmion有序的实空间动力学以及拓扑缺陷对长程有序的影响。该项目对中尺度系统中的界面和缺陷中介相关性提供了新的见解。该奖项反映了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

期刊论文数量(4)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Ultrafast formation of topological defects in a two-dimensional charge density wave
  • DOI:
    10.1038/s41567-023-02279-x
  • 发表时间:
    2022-11
  • 期刊:
  • 影响因子:
    19.6
  • 作者:
    Yun Cheng;A. Zong;Lijun Wu;Q. Meng;Weicong Xia;Fengfeng Qi;P. Zhu;Xiaoqun Zou;Tao Jiang;Yanfeng Guo;Jasper van Wezel;A. Kogar;M. Zuerch;Jie Zhang;Yimei Zhu;D. Xiang
  • 通讯作者:
    Yun Cheng;A. Zong;Lijun Wu;Q. Meng;Weicong Xia;Fengfeng Qi;P. Zhu;Xiaoqun Zou;Tao Jiang;Yanfeng Guo;Jasper van Wezel;A. Kogar;M. Zuerch;Jie Zhang;Yimei Zhu;D. Xiang
Detecting driving potentials at the buried SiO2 nanolayers in solar cells by chemical-selective nonlinear x-ray spectroscopy
  • DOI:
    10.1063/5.0156171
  • 发表时间:
    2023-07
  • 期刊:
  • 影响因子:
    4
  • 作者:
    M. Horio;T. Sumi;J. Bullock;Y. Hirata;Masashige Miyamoto;Bailey R. Nebgen;T. Wada;T. Senoo;Y. Tsujikawa;Y. Kubota;S. Owada;K. Tono;M. Yabashi;T. Iimori;Y. Miyauchi;M. Zuerch;I. Matsuda;C. Schwartz;W. Drisdell
  • 通讯作者:
    M. Horio;T. Sumi;J. Bullock;Y. Hirata;Masashige Miyamoto;Bailey R. Nebgen;T. Wada;T. Senoo;Y. Tsujikawa;Y. Kubota;S. Owada;K. Tono;M. Yabashi;T. Iimori;Y. Miyauchi;M. Zuerch;I. Matsuda;C. Schwartz;W. Drisdell
{{ item.title }}
{{ item.translation_title }}
  • DOI:
    {{ item.doi }}
  • 发表时间:
    {{ item.publish_year }}
  • 期刊:
  • 影响因子:
    {{ item.factor }}
  • 作者:
    {{ item.authors }}
  • 通讯作者:
    {{ item.author }}

数据更新时间:{{ journalArticles.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ monograph.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ sciAawards.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ conferencePapers.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ patent.updateTime }}

Michael Zuerch其他文献

Emerging ultrafast techniques for studying quantum materials
用于研究量子材料的新兴超快技术
  • DOI:
    10.1038/s41578-022-00530-0
  • 发表时间:
    2023-02-15
  • 期刊:
  • 影响因子:
    86.200
  • 作者:
    Alfred Zong;Bailey R. Nebgen;Sheng-Chih Lin;Jacob A. Spies;Michael Zuerch
  • 通讯作者:
    Michael Zuerch

Michael Zuerch的其他文献

{{ item.title }}
{{ item.translation_title }}
  • DOI:
    {{ item.doi }}
  • 发表时间:
    {{ item.publish_year }}
  • 期刊:
  • 影响因子:
    {{ item.factor }}
  • 作者:
    {{ item.authors }}
  • 通讯作者:
    {{ item.author }}

相似海外基金

Exploration of nonequilibrium electronic states under steady flow
稳态流动下非平衡电子态的探索
  • 批准号:
    21K14398
  • 财政年份:
    2021
  • 资助金额:
    $ 64.72万
  • 项目类别:
    Grant-in-Aid for Early-Career Scientists
Studying Nonequilibrium Steady States with Quantum Chemistry Methods
用量子化学方法研究非平衡稳态
  • 批准号:
    1954580
  • 财政年份:
    2020
  • 资助金额:
    $ 64.72万
  • 项目类别:
    Standard Grant
EAGER-QAC-QSA: COLLABORATIVE RESEARCH: QUANTUM SIMULATION OF EXCITATIONS, BRAIDING, AND THE NONEQUILIBRIUM DYNAMICS OF FRACTIONAL QUANTUM HALL STATES
EAGER-QAC-QSA:合作研究:激发、编织和分数量子霍尔态的非平衡动力学的量子模拟
  • 批准号:
    2037996
  • 财政年份:
    2020
  • 资助金额:
    $ 64.72万
  • 项目类别:
    Standard Grant
EAGER-QAC-QSA: COLLABORATIVE RESEARCH: QUANTUM SIMULATION OF EXCITATIONS, BRAIDING, AND THE NONEQUILIBRIUM DYNAMICS OF FRACTIONAL QUANTUM HALL STATES
EAGER-QAC-QSA:合作研究:激发、编织和分数量子霍尔态的非平衡动力学的量子模拟
  • 批准号:
    2038028
  • 财政年份:
    2020
  • 资助金额:
    $ 64.72万
  • 项目类别:
    Standard Grant
Microscopic theory for nonequilibrium steady states of Mott insulators
莫特绝缘体非平衡稳态的微观理论
  • 批准号:
    20K14407
  • 财政年份:
    2020
  • 资助金额:
    $ 64.72万
  • 项目类别:
    Grant-in-Aid for Early-Career Scientists
Theory of preformed pair states and nonequilibrium dynamics in materials with strong-coupling excitonic condensation
强耦合激子凝聚材料中的预成对态和非平衡动力学理论
  • 批准号:
    20H01849
  • 财政年份:
    2020
  • 资助金额:
    $ 64.72万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Moving state and its dynamics for the magnetic skyrmion at nonequilibrium steady and nonsteady states
非平衡稳态和非稳态磁斯格明子的运动状态及其动力学
  • 批准号:
    19K03709
  • 财政年份:
    2019
  • 资助金额:
    $ 64.72万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Nonequilibrium states of low-dimensional quasiparticles in a mesoscopic quantum Hall system
介观量子霍尔系统中低维准粒子的非平衡态
  • 批准号:
    19H05603
  • 财政年份:
    2019
  • 资助金额:
    $ 64.72万
  • 项目类别:
    Grant-in-Aid for Scientific Research (S)
Limit theorems for stationary nonequilibrium states
稳态非平衡态的极限定理
  • 批准号:
    18K13426
  • 财政年份:
    2018
  • 资助金额:
    $ 64.72万
  • 项目类别:
    Grant-in-Aid for Early-Career Scientists
Nonequilibrium states of polariton superfluids
极化子超流体的非平衡态
  • 批准号:
    DP160103311
  • 财政年份:
    2016
  • 资助金额:
    $ 64.72万
  • 项目类别:
    Discovery Projects
{{ showInfoDetail.title }}

作者:{{ showInfoDetail.author }}

知道了