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HL: Fachverband Halbleiterphysik
HL 36: Poster III
HL 36.4: Poster
Wednesday, March 20, 2024, 18:00–20:30, Poster E
Giant band Splitting in WSe2/WTe2 heterostructure — •jiabao yang1, wei yao1, pavel dudin2, jose avila2, stuart parkin1, and niels schröter1 — 1Max-Planck-Institute of Microstructure Physics, Weinberg2, 06120 Halle(Saale), Germany — 2Synchrotron SOLEIL, L*Orme des Merisiers , Saint Aubin BP 48, 91192 Gif sur Yvette Cedex, France
Two-dimensional (2D) heterostructures have emerged as a promising platform for investigating strongly correlated electronic phases. Transport measurements on WSe2/WTe2 have shown a switchable correlated insulating state by a ferroelectric field, but clearer evidence on how interlayer interaction and the formation of the Hubbard bands are influenced by ferroelectricity is still lacking. Based on Angle-Resolved Photoemission Spectroscopy (ARPES), we have found two interesting phenomena, the giant band splitting in the WSe2 layer with a ferroelectric WTe2 substrate, and the splitting of the bilayer WTe2 conduction band under the Moiré potential by WSe2.
Keywords: 2D material; Van der Waals heterostructure; ARPES; flat band; correlation electrons