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.

化学结构，动态和机制B计划支持内布拉斯加州大学物理与天文学系的彼得·道班教授，印第安纳大学普渡大学印第安纳波利斯物理系的Ruihua Cheng教授一起在这里描述了一个研究项目。该项目的重点是结合分子的分子，其主要特性是一个巨大的磁矩，分子带有大型电偶极子。这项研究可以使轻质，高速，低功率非易失性电子设备为广泛的应用制造。该项目汇集了基本界面化学，偶聚界面的偶极子耦合，边界轨道的建模，定义的高质量有机多层的制造以及用施加的电场来表征磁感应的。学生培训包括科学方面的国际经验。其他活动涉及本科生和研究生，包括来访的本科生，在化学和物理和外展活动的尖端研究中，学生学习如何与非技术性受众传达尖端研究。该项目着重于有机铁电层和自旋跨界分子吸附物之间的界面，其总体目标是理解主导这些金属有机络合物旋转状态的电压操作的机制。更具体地说，重点是与旋转杂交分子的杂分子相互作用的研究，以利用分子至全分子界面来创建新颖，更好的分子多表皮器件。为了实现这一目标，研究将围绕几个重要的研究目标：（1）确定用分子膜厚度确定旋转跨界现象学变化的原因；（2）更好地了解分子自旋态转换的能屏障；（3）了解分子叠加剂的自旋态由施加的电场控制的异质分子系统如何反应竞争过程；（4）确定连续膜中最小的可控域尺寸；（5）确定在分子旋转跨界薄膜中是否存在自旋方向各向异性屏障。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子和更广泛影响的评估评估标准来通过评估来支持的。