时间：8月13日9：30

地点：郭可信楼301

题目1：AI驱动固态热管理材料设计及其基因数据库构建

报告人：王辉（中南大学物理学院）

报告摘要：

    固态制冷通过施加外场（力、电、磁、光场等）诱导体系序参量转变来改变温度，是一种新型高能效、小型化的绿色制冷技术。受限于传统试错式的研究方式，且缺乏材料发现和性能提升方面的科学指导，其综合制冷性能远逊色于商用制冷剂。本次报告中，我们将介绍一种通用且高效的多物理场诱导的序参量转变计算方法，建立机器学习模型，在相变温度附近进行高通量计算获得关键制冷参数，效率比传统方法高一到两个数量级。此外，我们拓展了相变动力学演化的模拟方法，阐明了熵变的主要来源及其受控因素，为设计和优化固态制冷性能提供理论指导和新的材料体系。最后，我们发展了基于人工智能技术、材料/语言大模型和多模态智能体的固态热管理材料智算平台，构建了关联“微观结构-宏观性能”的材料基因组数据库系统（https://tmmd.csu.edu.cn），有望加速新型固态制冷材料从研发设计到实际应用的进程。

关键词：人工智能、材料基因、固态制冷，相变动力学，电声输运

报告人简介：

    王辉，中南大学教授/物理系主任，英国物理学会会士、瑞典国际先进材料学会会士、全球前2%顶尖科学家、中国智能计算年度创新人物、国家高层次人才、湖南省科技创新领军人才、湖南省杰青等；主要从事固态热管理材料设计及基因数据建设方面的研究，以第一/通讯作者身份在Nature、Nat. Mater.、Nat. Commun.、Sci. Adv.、PRL等期刊上发表学术论文百余篇，申请/授权国家发表专利10余项，获辽宁省自然科学一等奖（4/5），主持国家基金委、省部级重点研发和重点基金项目等10余项 ；兼任国际前沿材料大会、中国材料大会、湖南省物理学会等分会主席/学术委员/常务理事，担任Appl. Phys. Innov.、 MGE Adv.等期刊副编辑/编委等。

题目2：Revealing triclinic symmetry and magnetic properties of YCrO₃ Perovskites

报告人：Hai-Feng Li（Institute of Applied Physics and Materials Engineering, University of Macau）

Abstract

This research delves into the triclinic symmetry and ferroelectric nature of YCrO₃, a chromium-based perovskite, using single-crystal neutron diffraction. We uncover a unique structural configuration that accounts for its ferroelectric properties, alongside a G-type antiferromagnetic arrangement. The study provides a comprehensive analysis of the interplay between lattice and spin degrees of freedom, offering valuable insights into the coexistence of magnetic and electric orders. These findings enhance our understanding of YCrO₃'s potential in multifunctional applications, emphasizing the critical role of precise structural investigations in advancing perovskite research.

Keywords: Triclinic symmetry, Ferroelectric properties, YCrO₃ perovskite, Neutron diffraction, Antiferromagnetic structure

Short biography：

Professor Hai-Feng Li is an Associate Professor at the Institute of Applied Physics and Materials Engineering, University of Macau, specializing in condensed matter physics, magnetic and quantum functional materials, and single crystal growth via flux and optical floating-zone methods. He earned his Ph.D. in Engineering from Forschungszentrum Jülich and RWTH Aachen University in 2009, receiving the Borchers Plakette award, and later worked as a Marie Curie CONEX researcher at Universidad Carlos III de Madrid, as well as at the Max Planck Institute for Solid State Research. With over 20 years of experience in neutron and X-ray scattering at leading facilities worldwide, he has been recognized with honors including the National Outstanding Young Neutron Paper Award. Professor Li has published over 160 papers in leading journals such as Materials Today, Nature Communications, Physical Review Letters, Small, and Advanced Materials, with more than 4,300 citations and an h-index of 36, and holds 11 patents on crystal growth equipment and processes. His laboratory integrates material synthesis, crystal growth, structural characterization, and physical property measurement, supported by facilities including optical floating-zone and flux-growth furnaces and a PPMS DynaCool system. He also actively participates in academic communities and has organized several international conferences.