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Molecular Spintronics: Building the better Molecular Multiferroic from the Interface Outwards

分子自旋电子学：从界面向外构建更好的分子多铁性

基本信息

批准号：
1856614
负责人：
Peter Dowben
金额：
$ 18.46万
依托单位：
University of Nebraska-Lincoln
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2019
资助国家：
美国
起止时间：
2019-07-15 至 2020-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1856614&HistoricalAwards=false
关键词：
Molecular Spintronics Building better Multiferroic

项目摘要

The Chemical Structure, Dynamic & Mechanism B Program of the Chemistry Division supports Professor Peter Dowben of the Department of Physics and Astronomy at the University of Nebraska and Professor Ruihua Cheng of the Physics Department at Indiana University Purdue University-Indianapolis working together on a research project described here. This project focuses on combining molecules, whose dominant characteristic is a large magnetic moment, with molecules with large electric dipoles. The research could enable the fabrication of lightweight, high-speed, low-power non-volatile electronic devices for a broad range of applications. This project brings together investigations of fundamental interface chemistry, dipole coupling at heteromolecular interfaces, the modeling of frontier orbitals, the fabrication of defined high-quality organic multilayers, and characterization of magnetic induction with an applied electric field. Student training includes international experience in science. Other activities involve both undergraduate and graduate students, including visiting undergraduates, in cutting edge research at the interface of chemistry and physics and outreach activities where the students learn how to communicate cutting edge research to a nontechnical audience. The project focuses on the interface between organic ferroelectric layers and spin crossover molecule adsorbates, with a general goal of understanding the mechanisms that dominate the voltage manipulation of the spin state of these metal organic complexes. More specifically, the emphasis is on the investigation of heteromolecular interactions, with spin-crossover molecules, to exploit the molecule-to-molecule interface to create novel and better molecular multiferroic devices. To accomplish this goal, research will center around several important research objectives: (1) identify what determines the changes in spin crossover phenomenology with molecular film thickness; (2) better understand the energy barriers to molecular spin state switching; (3) learn how a heteromolecular system, where the spin state of the molecular overlayer is controlled by an applied electric field, reacts to competing processes; (4) identify the smallest controllable domain size within a continuous film; and (5) identify whether or not a spin orientation anisotropy barrier exists in a molecular spin crossover thin film.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.

化学系的化学结构、动力学和机制B项目支持内布拉斯加州大学物理和天文学系的Peter Dowben教授和印第安纳大学普渡大学-印第安纳波利斯分校物理系的郑瑞华教授共同开展的一个研究项目。该项目专注于将主要特征为大磁矩的分子与具有大电偶极子的分子相结合。这项研究可以制造出轻量级、高速、低功耗的非易失性电子设备，应用范围广泛。该项目结合了基础界面化学、异分子界面上的偶极耦合、前沿轨道的建模、已定义的高质量有机多层膜的制备以及外加电场的磁感应特性的研究。学生培训包括国际科学经验。其他活动包括本科生和研究生，包括来访的本科生，在化学和物理的界面上从事尖端研究，以及拓展活动，学生学习如何向非技术受众交流尖端研究。该项目专注于有机铁电层和自旋交叉分子吸附之间的界面，总体目标是了解主导这些金属有机络合物自旋态的电压操纵的机制。更具体地说，重点是研究异分子与自旋交叉分子的相互作用，以利用分子到分子的界面来创造新的和更好的分子多铁器件。为了实现这一目标，研究将围绕几个重要的研究目标：(1)确定是什么决定了自旋交叉现象随分子膜厚度的变化；(2)更好地理解了分子自旋态转换的能垒；(3)了解了分子覆盖层的自旋态受外加电场控制的杂分子系统如何对竞争过程做出反应；(4)确定了连续薄膜中最小的可控域尺寸；以及(5)确定分子自旋交叉薄膜中是否存在自旋取向各向异性势垒。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。