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    亚稳材料论坛第265期:New materials and new states under high pressure predicted from first-principles

    作者: 发布时间:2022-01-05 11:52:26

    报告题目:New materials and new states under high pressure predicted from first-principles

    人:孙建教授,南京大学

    间:202217日(星期五)上午10:00

    点:高压科学中心4-421会议室

    报告人简介:

    孙建,南京大学物理学院和固体微结构物理国家重点实验室教授,国家杰出青年基金获得者。2002年南京大学物理系本科,2007年南京大学物理系博士。2007-2013年先后在加拿大国家研究委员会、德国波鸿鲁尔大学、英国剑桥大学卡文迪许实验室从事博士后研究,2013年受聘于南京大学工作至今。研究领域为计算凝聚态物理、高压物理和材料设计。发展了晶体结构预测新方法;预言了多个新材料,若干被实验证实;预言了若干系统在高温高压下的超离子态、塑晶态和协同扩散态等新奇物态。已发表SCI论文80余篇。曾获2008年德国洪堡奖学金、2011年中国国家自然科学二等奖(第五完成人)、2012年欧盟玛丽居里奖学金、2013年国家“海外高层次青年人才”、2014年GRC Van Valkenburg奖、2015江苏省杰出青年基金、2021年国家基金委杰出青年基金等荣誉。担任中国物理学会高压物理专业委员会委员、中国材料学会计算材料学分会委员。

    报告摘要:

    In this talk, I will introduce the methods developed in my group, including a machine learning accelerated crystal structure prediction method[1], and a method determining the dimensionality and multiplicity of crystal nets using quotient graph[2]. In addition, I will show some of our recent progresses on the applications of these methods combining with first-principles calculations, for instance, the predictions on new compounds[3-4]and their exotic new states under planetary conditions (superionic state, plastic state, and coexistence)[5-7], as well as the superionic-like cooperative diffusion in an elemental system[8], etc.

    REFERENCE

    1.Kang Xia et al., “A novel superhard tungsten nitride predicted by machine-learning accelerated crystal structure search”,Sci. Bull.63, 817 (2018).

    2.Hao Gao, Junjie Wang, Zhaopeng Guo, Jian Sun, “Determining dimensionalities and multiplicities of crystal nets”npj Comput. Mater.6, 143 (2020).

    3.Cong Liu et al., “Mixed coordination silica at megabar pressure”,Phys. Rev. Lett.126, 035701 (2021).

    4.Nilesh P. Salke et al., “Tungsten hexanitride with single-bonded armchair-like hexazine structure at high pressure”,Phys. Rev. Lett.126, 065702 (2021).

    5.Cong Liu et al., “Multiple superionic states in helium-water compounds”,Nature Physics15, 1065 (2019).

    6.Cong Liu et al., “Plastic and Superionic Helium Ammonia Compounds under High Pressure and High Temperature”,Phys. Rev. X10, 021007 (2020).

    7.Hao Gao et al., “Coexistence of plastic and partially diffusive phases in a helium-methane compound”,Natl. Sci. Rev.7, 1540 (2020).

    Y. Wang et al., “Electronically driven 1D cooperative diffusion in a simple cubic crystal”,Phys. Rev. X11, 011006 (2021).