Yimin Xiong

Oct 16, 2024 | nature.com | Wenliang Zhang |Teguh Citra Asmara |Yi Tseng |Yimin Xiong |Kurt Kummer |Vladimir N. Strocov | +2 more

AbstractHoneycomb and kagome lattices can host propagating excitations with non-trivial topology as defined by their evolution along closed paths in momentum space. Excitations on such lattices can also be momentum-independent, and the associated flat bands are of interest due to strong interactions between heavy quasiparticles.

Apr 22, 2024 | nature.com | Yihao Wang |Zhihao Li |Xuan Luo |Jingjing Gao |Yuyan Han |Jin Tang | +12 more

AbstractWhile the monolayer sheet is well-established as a Mott-insulator with a finite energy gap, the insulating nature of bulk 1T-TaS2 crystals remains ambiguous due to their varying dimensionalities and alterable interlayer coupling. In this study, we present a unique approach to unlock the intertwined two-dimensional Mott-insulator and three-dimensional band-insulator states in bulk 1T-TaS2 crystals by structuring a laddering stack along the out-of-plane direction.