DMREF: GOALI: Tetrahedral Ferroelectrics

DMREF：GOALI：四面体铁电体

• 批准号: 2119281
• 负责人: Geoff Brennecka
• 金额: $ 180万
• 依托单位: Colorado School of Mines
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-06-01 至 2026-05-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2119281&HistoricalAwards=false
• 关键词: DMREF; GOALI; Tetrahedral; Ferroelectrics

Nontechnical Description:Ferroelectricity is the ability to reverse a spontaneous electrical polarization by the application of an external electric field. This property is crucial to many modern electronic and optical technologies, but there has been limited success directly integrating ferroelectric materials with electronics based on conventional semiconductors despite decades of efforts. Part of the challenge is that traditional ferroelectrics exhibit very different crystal structures, bonding, and defect densities from commercial semiconductors such as silicon. This project seeks to resolve this problem by introducing a new class of ferroelectric materials with a tetrahedral bonding structure common to commercial semiconductors. Introducing a new function to tetrahedral semiconductors will represent a step change in the capabilities of integrated electronic and optical devices. This project will discover and develop new tetrahedral ferroelectrics and result in a new mechanistic understanding of ferroelectricity. The project will emphasize workforce development, through the education of students and post-docs trained to accelerate materials discovery via modern approaches to integrated computation and experiment. Technological advances will be accelerated through close collaboration with an industrial partner, Broadcom, Inc. Technical Description:Tetrahedral ferroelectrics such as modified aluminum nitride (AlN) offer a unique opportunity to extend our fundamental understanding of polarization reorientation and to discover new families of materials with enabling non-linear dielectric properties. The recent discovery of tetrahedral ferroelectrics has highlighted gaps in the scientific understanding of ferroelectricity and of polar semiconductors. The current project addresses three sets of fundamental questions: (1) How is switchable polarization related to coercive field, a paraelectric transition and/or stiffness? How is coercive field related to structure? (2) What is (are) the switching mechanism(s) in tetrahedral ferroelectrics? (3) How do local structure, individual and clustered point defects, and synthesis affect switching and breakdown? These questions will be addressed via integrated computation and experimentation, expanding the understanding of the fundamentals of ferroelectricity and of polar semiconductors alike. Enabling ferroelectricity in tetrahedral semiconductors represents a potential step change in semiconductor device capability and offers an attractive alternative to fighting defect accommodation in complex oxides. This project will expand ferroelectric and semiconductor physics, through a greater understanding of the mechanisms of polarization reorientation that welcomes a family of heretofore unknown tetrahedra-based systems to the universe of known ferroelectrics while simultaneously introducing a new intrinsic capability to the toolbox of tetrahedral semiconductors.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：铁电是通过施加外部电场来反转自发电极化的能力。这种特性对于许多现代电子和光学技术至关重要，但尽管经过了数十年的努力，将铁电材料与基于传统半导体的电子器件直接集成的成功仍然有限。部分挑战在于，传统铁电体表现出与硅等商用半导体截然不同的晶体结构、键合和缺陷密度。该项目旨在通过引入一种新型铁电材料来解决这个问题，该材料具有商业半导体常见的四面体键合结构。向四面体半导体引入新功能将代表集成电子和光学器件功能的阶跃变化。该项目将发现和开发新的四面体铁电体，并对铁电性产生新的机械理解。该项目将强调劳动力发展，通过对学生和博士后进行教育，让他们通过现代综合计算和实验方法加速材料发现。通过与工业合作伙伴 Broadcom, Inc. 的密切合作，将加速技术进步。 技术描述：改性氮化铝 (AlN) 等四面体铁电体提供了一个独特的机会，可以扩展我们对极化重定向的基本理解，并发现新的材料系列实现非线性介电特性。最近四面体铁电体的发现凸显了对铁电性和极性半导体的科学理解上的差距。当前的项目解决了三组基本问题：（1）可切换极化与矫顽场、顺电转变和/或刚度有何关系？矫顽场与结构有何关系？ (2) 四面体铁电体的开关机制是什么？ (3) 局部结构、个体和聚集点缺陷以及合成如何影响开关和击穿？这些问题将通过综合计算和实验来解决，从而扩大对铁电性和极性半导体等基础知识的理解。在四面体半导体中实现铁电性代表着半导体器件能力的潜在阶跃变化，并为对抗复杂氧化物中的缺陷调节提供了一种有吸引力的替代方案。该项目将通过更好地理解极化重定向机制来扩展铁电和半导体物理学，将一系列迄今为止未知的基于四面体的系统引入已知铁电体的宇宙，同时为四面体半导体工具箱引入新的固有功能。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值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

Polarity effects on wake‐up behavior of Al 0.94 B 0.06 N ferroelectrics

极性对 Al 0.94 B 0.06 N 铁电体唤醒行为的影响

• DOI: 10.1111/jace.19382
• 发表时间: 2023-08
• 期刊: Journal of the American Ceramic Society
• 影响因子: 3.9
• 作者: Yazawa, Keisuke;Drury, Daniel;Hayden, John;Maria, Jon‐Paul;Trolier‐McKinstry, Susan;Zakutayev, Andriy;Brennecka, Geoff L.
• 通讯作者: Brennecka, Geoff L.

Anomalously abrupt switching of wurtzite-structured ferroelectrics: simultaneous non-linear nucleation and growth model

纤锌矿结构铁电体的异常突变：同时非线性成核和生长模型

• DOI: 10.1039/d3mh00365e
• 发表时间: 2023-07
• 期刊: Materials Horizons
• 影响因子: 13.3
• 作者: Yazawa, Keisuke;Hayden, John;Maria, Jon;Zhu, Wanlin;Trolier;Zakutayev, Andriy;Brennecka, Geoff L.
• 通讯作者: Brennecka, Geoff L.

Interlayer registry effects on the electronic and piezoelectric properties of transition metal dichalcogenide bilayers

层间配准对过渡金属二硫属化物双层电子和压电性能的影响

• DOI: 10.1116/6.0003264
• 发表时间: 2024-05
• 期刊: Journal of Vacuum Science & Technology A
• 影响因子: 2.9
• 作者: Likith, S. R.;Brennecka, Geoff L.;Ciobanu, Cristian V.
• 通讯作者: Ciobanu, Cristian V.

Emerging materials and design principles for wurtzite-type ferroelectrics

纤锌矿型铁电体的新兴材料和设计原理

• DOI: 10.1016/j.matt.2024.02.001
• 发表时间: 2024-04
• 期刊: Matter
• 影响因子: 18.9
• 作者: Lee, Cheng;Din, Naseem Ud;Yazawa, Keisuke;Brennecka, Geoff L.;Zakutayev, Andriy;Gorai, Prashun
• 通讯作者: Gorai, Prashun

Local chemical origin of ferroelectric behavior in wurtzite nitrides

纤锌矿氮化物中铁电行为的局部化学起源

• DOI: 10.1039/d2tc02682a
• 发表时间: 2022-12
• 期刊: Journal of Materials Chemistry C
• 影响因子: 6.4
• 作者: Yazawa, Keisuke;Mangum, John S.;Gorai, Prashun;Brennecka, Geoff L.;Zakutayev, Andriy
• 通讯作者: Zakutayev, Andriy