2 papers
cond-mat.mtrl-sci2026
Domain-Direct Band Gaps: Classification and Material Realization
Yalan Wei, Hairui Ding, Shifang Li +4
The conventional classification of direct band-gap semiconductors relies on point-like extrema in momentum space. Here, we introduce the concept of domain-direct band gaps, where t…
cond-mat.mes-hall2025
Two-dimensional flat-bands in Moire-diamonds
Yalan Wei, Shifang Li, Yuke Song +1
The discovery of flat-bands in magic-angle twisted bilayer graphene has underscored the potential of moire engineering for correlated states, but such phases are notoriously diffic…