Fabrication and Characterization of the Moiré surface state on a topological insulator
arXiv:2509.03322 · doi:10.1021/acs.nanolett.5c03535
Abstract
A Moire superlattice on the topological insulator surface is predicted to exhibit many novel properties but has not been experimentally realized. Here, we developed a two-step growth method to successfully fabricate a topological insulator Sb2Te3 thin film with a Moire superlattice, which is generated by a twist of the topmost layer via molecular beam epitaxy. The established Moire topological surface state is characterized by scanning tunneling microscopy and spectroscopy. By application of a magnetic field, new features in Landau levels arise on the Moire region compared to the pristine surface of Sb2Te3, which makes the system a promising platform for pursuing next-generation electronics. Notably, the growth method, which circumvents contamination and the induced interface defects in the manual fabrication method, can be widely applied to other van der Waals materials for fabricating Moire superlattices.
arXiv comment16 pages,4 figures,1 table
References in corpus (16)
- Magic-angle graphene superlattices: a new platform for unconventional superconductivity
- Correlated Insulator Behaviour at Half-Filling in Magic Angle Graphene Superlattices
- Moire bands in twisted double-layer graphene
- Superconductors, Orbital Magnets, and Correlated States in Magic Angle Bilayer Graphene
- Intrinsic quantized anomalous Hall effect in a moiré heterostructure
- Observation of Moiré Excitons in WSe2/WS2 Heterostructure Superlattices
- Optical detection of Mott and generalized Wigner crystal states in WSe2/WS2 moiré superlattices
- Graphene Bilayers with a Twist
- Signatures of Fractional Quantum Anomalous Hall States in Twisted MoTe2 Bilayer
- Landau quantization and the thickness limit of topological insulator thin films of Sb2Te3
- Fermi Level Tuning of Epitaxial Sb2Te3 Thin Films on Graphene by Regulating Intrinsic Defects and Substrate Transfer Doping
- A moiré superlattice on the surface of a topological insulator
- Observation of Zeeman effect in topological surface state with distinct material dependence
- Visualizing Landau levels of Dirac electrons in a one dimensional potential
- Moiré Landau fans and magic zeros
- Landau levels in a topological insulator