Experimental observation of the Berry curvature by angle-resolved photoemission
일 시 : 2020년 11월 03일 화요일 16:00
연 사 : 박 승 룡 교수 (인천대 물리학과 )
장 소 : 자연과학관 208호
초 록
Angle-resolved photoemission spectroscopy (ARPES) has been now widely used to map electronic band dispersions in momentum space in various materials such as 2D transition metal dichalcogenides (TMD). ARPES is being developed in a couple of ways to obtain more informations of solids. Circular dichroism (CD) in ARPES is one of them to obtain the information of wave function character such as the Berry curvature. In this talk, basic principles of ARPES will be briefly introduced. After that, recent results on observation of the Berry curvature in a TMD, 2H-WSe2 by using CD-ARPES will be discussed. [1, 2]