高压物理学报2026，Vol.40Issue(1)：102-121,20.DOI:10.11858/gywlxb.20251054
锡的多相物态方程的第一性原理计算研究
First-Principles Study on the Multiphase Equation of State of Tin
摘要
Abstract
Metallic tin is a focal point in high-pressure physics research and a critical material of strategic importance in defense-related technologies.Due to the rich physical phases of tin,it is crucial to study the multiphase equation of state and phase boundaries of tin,whether in basic research or industrial applications.This work systematically investigates the high-temperature and high-pressure multiphase equation of state(EOS),phase boundaries,elastic modulus,sound velocities,and Hugoniot curves of tin using density functional theory(DFT)combined with the mean-field potential(MFP)method.The results not only provide the multiphase EOS of tin under extreme conditions but also demonstrate good agreement with experimental data for the β-γ phase boundary and ambient-pressure sound velocities of β-Sn.Furthermore,this study evaluates the effects of different density functionals(LDA,PBEsol,and SCAN)on the high-pressure EOS.The LDA and PBEsol functionals show superior consistency with experimental Hugoniot curves and ambient-pressure elastic moduli,while the SCAN functional exhibits larger deviations in phase boundary predictions but achieves closer agreement with experimental ambient-pressure sound velocities for β-Sn.关键词
多相物态方程/弹性模量/第一性原理计算/平均场势Key words
multiphase equation of state/elastic modulus/first-principles calculations/mean-field potential分类
数理科学引用本文复制引用
CHEN Kaile,WANG Yuechao,XU Yuanji,LIU Yu,XIAN Jiawei,WANG Lifang,JIAN Dan,LIU Haifeng,SONG Haifeng..锡的多相物态方程的第一性原理计算研究[J].高压物理学报,2026,40(1):102-121,20.基金项目
国家重点研发计划(2021YFB3501503) （2021YFB3501503）
国家自然科学基金(U23A20537) （U23A20537）
国家重大科研仪器研制专项(62327804) （62327804）
计算物理全国重点实验室基金 （）
