Experimental Realization of Two-Dimensional Buckled Lieb lattice
arXiv:2001.01045 · doi:10.1021/acs.nanolett.9b05316
Abstract
Two-dimensional (2D) materials with a Lieb lattice can host exotic electronic band structures. Such a system does not exist in nature, and it is also difficult to obtain in the laboratory due to its structural instability. Here, we experimentally realized a 2D system composed of a tin overlayer on an aluminum substrate by molecular beam epitaxy. The specific arrangement of Sn atoms on the Al(100) surface, which benefits from favorable interface interactions, forms a stabilized buckled Lieb lattice. Our theoretical calculations indicate a partially broken nodal line loop protected by its mirror reflection symmetry and a topologically nontrivial insulating state with a spin-orbital coupling (SOC) effect in the band structure of this Lieb lattice. The electronic structure of this system has also been experimentally characterized by scanning tunnelling spectroscopy and angle-resolved photoemmision spectroscopy. Our work provides an appealing method for constructing 2D quantum materials based on the Lieb lattice.
arXiv comment14 pages, 4 figures
References in corpus (19)
- Two Dimensional Atomic Crystals
- Topological Insulators with Inversion Symmetry
- Observation of a localized flat-band state in a photonic Lieb lattice
- Observation of bound states in Lieb photonic lattices
- Experimental realization and characterization of an electronic Lieb lattice
- Coherent driving and freezing of bosonic matter wave in an optical Lieb lattice
- Geometric origin of superfluidity in the Lieb lattice flat band
- Electronic Transport in Two-Dimensional Materials
- Topological states in engineered atomic lattices
- Topological Insulators on the Lieb and Perovskite Lattices
- Topological Phases for Fermionic Cold Atoms on the Lieb Lattice
- Two-dimensional Mott-Hubbard electrons in an artificial honeycomb lattice
- Unconventional Flatband Line States in Photonic Lieb Lattices
- Superconducting Transitions in Flat Band Systems
- Strain-Induced Band Engineering in Monolayer Stanene on Sb(111)
- Quantum Anomalous Hall Effect in Flat Band Ferromagnet
- Theoretical analysis of the electronic structure of the stable and metastable c(2x2) phases of Na on Al(001): Comparison with angle-resolved ultra-violet photoemission spectra
- Two-dimensional Chern semimetals on the Lieb lattice
- Fractional Chern Insulator phase at the transition between checkerboard and Lieb lattice