摘要
The effect of strain on charge density wave(CDW)order inα-U is investigated within the framework of relativistic density-functional theory.The energetical stability ofα-U with CDW distortion is enhanced by the tensile strain along a and b axes,which is similar to the case of negative pressure and normal.However,the tensile strain along c axis suppresses the energetical stability of CDW phase.This abnormal effect could be understood from the emergence of a new onedimensional atomic chain along c axis inα-U.Furthermore,this effect is supported by the calculations of Fermi surface and phonon mode,in which the topological objects and the dynamical instability show opposite behaviors between strains along a/b and c axes.
作者
谢刘桦
袁宏宽
邱睿智
Liuhua Xie;Hongkuan Yuan;Ruizhi Qiu(School of Physical Science and Technology,Southwest University,Chongqing 400715,China;Institute of Materials,China Academy of Engineering Physics,Mianyang 621907,China)
基金
supported by the National Natural Science Foundation of China(Grant Nos.22176181,11874306,and 12174320)
the Foundation of Science and Technology on Surface Physics and Chemistry Laboratory(Grant No.WDZC202101)
the Natural Science Foundation of Chongqing,China(Grant No.cstc2021jcyj-msxmX0209)。