项目名称: 二维Crn+1CnT2(T=O、OH、F)材料的电子结构与磁性的第一性原理研究
项目编号: No.51502154
项目类型: 青年科学基金项目
立项/批准年度: 2016
项目学科: 一般工业技术
项目作者: 杨建辉
作者单位: 衢州学院
项目金额: 21万元
中文摘要: 最近研究发现前过渡金属碳化物或氮化物可以形成稳定的、表面被O、F、OH覆盖的二维结构,称为MXene。其在电子器件、催化、锂电池阳极材料等领域具有重要的应用前景。在各种MXene结构中,研究表明Crn+1CnT2结构中Cr原子具有较强磁矩,是一类有潜力的二维磁性材料。本项目将利用第一性原理方法研究Crn+1CnT2 (n=1、2、3;T=O、OH、F)的铁磁与各种反铁磁结构,寻找能量基态,并分析其电子特征与磁性。进而研究C原子层数(n)、表面吸附物(T)、以及弹性形变对其电子结构与磁性的影响。本项目将有利于深化人们对Crn+1CnT2电子结构与磁性的认识,调整Crn+1CnT2的电子结构与原子磁矩,促进其在磁性器件、自旋电子学、催化、传感器等领域的应用研究。
中文关键词: MXene;电子结构计算;磁性;第一性原理;二维材料
英文摘要: Recent researches show that early transition metal carbides and nitrides can form stable two-dimensional structures terminated by O, F, and OH, so called MXene. They are significant materials in electronics, catalysis, and anode materials for Li ion batteries. Among MXenes, some researches show that Crn+1CnT2 is a kind of promising two-dimensional magnetic material with relative high magnetic moment of Cr atoms. In this project, by using the first principles, we will investigate the ground states, electronic structures, and magnetic properties of Crn+1CnT2(n=1, 2, and 3; T=O, OH, and F). Next, we will analysis the effects of the number of C layers (n), surface adsorptions (T), and elastic deformation on electronic structures and magnetic properties. This project will benefit for the recognition and tuning electronic structures and magnetic properties of Crn+1CnT2, and promoting the application researches of them in magnetic device, spin electronics, catalysis, and sensor.
英文关键词: MXene;electronic structure calculation;Magnetic;first principles;two-dimensional material