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TT: Fachverband Tiefe Temperaturen
TT 35: Focus Session: Correlations in Moiré Quantum Matter I
TT 35.7: Talk
Wednesday, March 29, 2023, 18:00–18:15, HSZ 03
Moiré minibands of twisted MoS2 heterostructures — •Chithra H. Sharma1,2, Marta Prada1, Jan-Hendrick Schmidt1, Lars Tiemann1, Tobias Stauber3, Takashi Taniguchi4, Kenji Watanabe4, Robert Zierold1, Kai Rossnagel2, and Robert H. Blick1,5 — 1Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg — 2CAU Kiel, Leibnitzstrasse 19, 24118 Kiel — 3ICMM-CSIC, Sor Juana Inés de la Cruz 3, Madrid 28049 Spain — 4Research Center for Functional Materials, National Institute for Materials Science, Namiki 1-1, Tsukuba, 305-0044, Ibaraki, Japan — 5Material Science and Engineering, University of Wisconsin-Madison, University Ave. 1550, Madison, 53706, Wisconsin, USA
In the last decade, the evolution of van der Waals material systems has provided a multitude of options to manipulate, control, and engineer materials properties to various needs by combination, proximity, and twisting. Moiré superlattices formed as a result of lattice mismatch or twist angle modify the electronic structure to create flat bands and host exotic correlated electron phases. Here we observe the existence of low-dispersing mini-bands near the conduction band edge of MoS2 twisted devices. We employ transport measurements and resolve discrete states within the band gap at low temperatures, in agreement with first-principles density functional theory calculations. We could also infer that the mini-bands correspond to iso-spin flavors as a result of interaction in the system coherent with our temperature dependence.