题 目:First-principles Non-equilibrium Dynamical Cluster Theory for
Quantum Transport Simulation of Disordered Nano-electronic Devices
报告人:柯友启 教授 上海科技大学
时 间:2022年4月19日(星期二) 下午14:00
地 点:腾讯会议 ID 798-394-978
报告摘要:The inevitable random impurities or defects can significantly influence the ground-state and excitation properties of materials and devices. The capability of effectively treating disorder effects is thus indispensable for theoretical simulations of materials. In this talk, I will discuss the major theoretical challenges for simulating disordered materials, and introduce the first-principles non-equilibrium dynamical cluster theory to enable the effective simulation of the quantum transport properties of disordered nanoelectronics. In this method, the dynamical cluster theory is formulated for the Keldysh’s nonequilibrium Green’s function to treat the nonequilibrium quantum statistics in the operating device. The first-principles implementation is realized in the framework of the Exact Muffin-Tin Orbital based density function theory. As an example, we apply the method to reveal the giant influence of spatially correlated surface roughness on electronic tunneling (in Fe/Va/Fe tunneling junctions).
报告人介绍:柯友启,国家青年人才,上海科技大学物质科学与工程学院终身教授和研究员;2011年在加拿大麦吉尔大学物理系获得理论凝聚态物理方向博士学位,之后进入普林斯顿大学Emily Ann Carter教授课题组从事博士后研究工作,2014年加入上海科技大学物质科学与技术学院担任独立课题组PI。 至今已经在PRL,PRB,JPCL等核心期刊发表40多篇研究论文,已经获得国家自然科学基金项目的支持,研究方向主要涉及处理无序的平均场理论,第一性原理方法,非平衡态格林函数方法和量子输运理论,目前在上科大的主要研究成果已经形成了一个自主可控的基于高度局域化且最小完备基组Exact Muffin-Tin Orbtial的第一性原理器件材料模拟软件包:SIGMAX。