6月13日9:30学术报告|Designing Novel Ferroelectric Phenomena using Symmetry-Adapted Effective Hamiltonian Models

报告题目：Designing Novel Ferroelectric Phenomena using Symmetry-Adapted Effective Hamiltonian Models

报告人：Peng Chen 博士 

时间：2024年6月13日9:30

地点：田家炳楼平星报告厅（203）

邀请人：董帅 教授

报告人简介：

Peng Chen received his Ph.D. degree in Theoretical Physics from the Institute of Physics, Chinese Academy of Sciences (China) in 2017. Since 2019, he has been working as a Research Associate at the Department of Physics, University of Arkansas (US). Prior to this, from 2017 to 2019, he held the position of Postdoctoral Researcher at the Italian Institute of Technology (Italy), and from 2015 to 2016, he was a visiting researcher at the Luxembourg Institute of Science and Technology (Luxembourg). Peng's research endeavors revolve around the intricate couplings of ferroic orders and light-matter interactions in functional and quantum materials. For more, please visit https://sites.google.com/view/peng-chen-iphy

报告摘要：

Symmetry stands as a cornerstone in condensed matter physics. However, while symmetry analysis provides invaluable insights, it often falls short of providing precise numerical values. Herein lies the complementary role of Density Functional Theory (DFT) simulations. In this talk, I will present our recent research endeavors involving theoretical studies of novel phenomena in ferroelectric materials using the symmetry-adapted effective Hamiltonian method, geared towards designing strategies to control their collinear and non-collinear dipolar states. Specifically, the talk delves into two parts: (i) terahertz light-induced ferroelectric reversal and (ii) Screwing ferroelectricity. These studies unlock new functionalities and potential applications of ferroelectrics. Lastly, I will briefly introduce our state-of-the-art materials modeling approach.