陈默涵 | Large-Scale First-Principles Methods: Recent Developments and Applications

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报告题目:Large-Scale First-Principles Methods: Recent Developments and Applications

报告人:陈默涵  研究员    北京大学应用物理与技术研究中心

报告时间:2022年02月23日(周三)上午10:00

报告地点:物理研究所M楼253会议室

报告摘要

First-principles molecular dynamics based on Kohn-Sham density functional theory (DFT) has been an important simulation tool in investigating various properties of materials. Water is of the utmost importance for life and technology. However, a genuinely predictive ab initio model of water has eluded scientists. We model the hydrated water ions (hydronium and hydroxide) with corrections for nonlocal van der Waals interactions and self-interaction in the electronic ground state. We provide theoretical explanations to why hydronium diffuses faster than hydroxide, which has been a puzzle for over two centuries. In addition, we introduce our recent developed DFT package ABACUS that features numerical atomic orbitals. Finally, we briefly introduce our recent efforts in combing DFT with deep potential molecular dynamics.

报告人简介

陈默涵,本科和博士毕业于中国科学技术大学物理系,先后在普林斯顿大学和天普大学从事博士后研究,2018年11月加入北京大学应用物理与技术研究中心任研究员。研究兴趣包含发展密度泛函理论的新算法和基于机器学习的分子模拟方法,并将这些方法应用于研究温稠密物质、液态水和离子、液态金属等材料,在PRL, PNAS, Nature Chemistry,Science Advances, Nuclear Fusion等国际核心学术刊物上发表重要论文。申请人作为主要完成人之一开发了两套密度泛函理论计算软件ABACUS和PROFESS 3.0,基于深度势能方法的超大规模并行模拟工作获得2020年“戈登贝尔奖”,并入选“两院院士评选2020年中国十大科技进展新闻”。主持自然科学基金面上和优秀青年基金项目。