한양대학교 물리학과 BK-Four 양자물질 극한물성 교육연구팀 한양대학교 물리학과

 The V-based kagome metals in two dimensions

• 일 시 : 2021년 07월 08일 목요일 16:00

• 연 사 : 김 영 국 교수 (성균관대학교 물리학과)

• 장 소 : 온라인 진행

• HOST : 신 상 진 교수님

• 초 록

 The kagome metals refer to a two-dimensional lattice made of metal atoms that are arranged in a lattice resembling the Japanese kagome basket weaving pattern.  Recently, significant attention has been paid to a newly synthesized family of V-based kagome metals AV₃Sb₅, where A = K, Rb, and Cs. Many exotic physical phenomena have been reported in AV₃Sb₅, ranging from nontrivial band topology, unconventional superconductivity, and charge density ordering concurrent with breaking of time-reversal symmetry. In this talk, I will review the current developments and issues of the V-based kagome metals, and present our recent study of the V-based Kagome metals in two dimensions. Using first-principles calculations, we show that the V-based kagome can be stabilized in its single-layered form. The AV₃Sb₅ monolayer will be discussed in view of topological phases and strong correlations of electron. Our results suggest the existence of a new two-dimensional platform, which could help reveal the enriched connection between band topology and strong correlations.