Flat Band Generation Through Interlayer Geometric Frustration in Intercalated Transition Metal Dichalcogenides.

ABSTRACT: Electronic flat bands can lead to rich many-body quantum phases by quenching the electron's kinetic energy and enhancing many-body correlation. The reduced bandwidth can be realized by either destructive quantum interference in frustrated lattices, or by generating heavy band folding with avoided band crossing in Moiré superlattices. Here a general approach is proposed to introduce flat bands into widely studied transition metal dichalcogenide (TMD) materials by dilute intercalation. A flat band with vanishing dispersion is observed by angle-resolved photoemission spectroscopy (ARPES) over the entire momentum space in intercalated Mn_1/4TaS₂. Polarization-dependent ARPES measurements combined with symmetry analysis reveal the orbital characters of the flat band. Superc

SUBMITTER: Peng Y 

PROVIDER: S-EPMC11855231 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature