Berezinskii-Kosterlitz-Thouless phase transition in a 2D-XY ferromagnetic monolayer  

作　　者：Jiesu Wang 

机构地区：[1]Beijing Academy of Quantum Information Sciences,Beijing 100193,China

出　　处：《Journal of Semiconductors》2021年第12期12-14,共3页半导体学报（英文版）

摘　　要：It has been widely discussed whether long-range magnet-ic order could exist in low-dimensional(d<3)systems.Early studies,like Hohenberg-Mermin-Wagner theorem based on the Heisenberg model of magnetism,incline to a negative con-clusion,as the thermal fluctuation at any finite temperature prevents the formation of long-range magnetic order^([1,2]).However,further studies theoretically predicted an unusual long-range magnetic order in the two-dimensional(2D)sys-tems that are described by a so-called 2D-XY model,result-ing from the formation of bound pairs of vortices and anti-vor-tices with opposite chirality^([3,4]).

关 键 词：FERROMAGNETIC MONOLAYER HEISENBERG 

分 类 号：O469[理学—凝聚态物理]