The Stokes-Einstein-Debye relation in ortho-terphenyl liquid  

作　　者：任淦 Gan Ren(School of Science,Civil Aviation Flight University of China,Guanghan 618307,China)

机构地区：[1]School of Science,Civil Aviation Flight University of China,Guanghan 618307,China

出　　处：《Communications in Theoretical Physics》2024年第5期148-153,共6页理论物理通讯（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 12104502);the Natural Science Foundation of Sichuan Province (No. 2023YFG0308)

摘　　要：The Stokes–Einstein–Debye(SED)relation is proposed to be broken down in supercooled liquids by many studies.However,conclusions are usually drawn by testing some variants of the SED relation rather than its original formula.In this work,the rationality of the SED relation and its variants is examined by performing molecular dynamics simulations with the Lewis–Wahnstrom model of ortho-terphenyl(OTP).The results indicate the original SED relation is valid for OTP but the three variants are all broken down.The inconsistency between the SED relation and its variants is analyzed from the heterogeneous dynamics,the adopted assumptions and approximations as well as the interactions among molecules.Therefore,care should be taken when employing the variants to judge the validity of the SED relation in supercooled liquids.

关 键 词：Stokes-Einstein-Debye relation Stokes-Einstein relation supercooled liquids Stokes'formula 

分 类 号：O469[理学—凝聚态物理]