Coherent Electronic Band Structure of TiTe<sub>2</sub>/TiSe<sub>2</sub> Moiré Bilayer
Meng-Kai Lin, Tao He, Joseph A. Hlevyack, Peng Chen, Sung‐Kwan Mo, M. Y. Chou, T.‐C. Chiang
Abstract
monolayers exhibits emergent electronic structure as evidenced by angle-resolved photoemission band mapping. The two monolayers adopt the same lattice orientation but incommensurate lattice constants. Despite the lack of translational symmetry, sharp dispersive bands are observed. The dispersion relations appear distinct from those for the component monolayers alone. Theoretical calculations illustrate the formation of composite bands by coherent electronic coupling despite the weak interlayer bonding, which leads to band renormalization and energy shifts.
Topics & Concepts
Condensed matter physicsMonolayerBilayerElectronic structureElectronic band structureMaterials sciencevan der Waals forceTranslational symmetryLattice (music)Band gapLattice constantPhysicsChemistryNanotechnologyOpticsDiffractionMoleculeQuantum mechanicsAcousticsMembraneBiochemistry2D Materials and ApplicationsPerovskite Materials and ApplicationsMXene and MAX Phase Materials