| AVS 66th International Symposium & Exhibition | |
| 2D Materials | Thursday Sessions |
| Session 2D+EM+MI+NS+QS+SS-ThM |
| Session: | Dopants, Defects, and Interfaces in 2D Materials |
| Presenter: | Tyler Smith, University of Tennessee Knoxville |
| Authors: | S. Smith, University of Tennessee Knoxville H. Weitering, University of Tennessee Knoxville |
| Correspondent: | Click to Email |
The 1/3 ML monolayer (ML) ‘alpha phase’ of Sn on Si(111) is a remarkable platform for the study of strong correlations in a spin ½ triangular adatom lattice. In this work, we employ an adatom doping scheme by depositing potassium onto the triangular Sn lattice. The K-atoms destabilize the parent Mott insulating phase and produce a charge-ordered insulator, revealing a rare Kagome lattice at the surface. Scanning Tunneling Microscopy and Spectroscopy reveal a phase transition from an insulating kagome lattice to a metallic triangular lattice at about 200 K. DFT band structure calculations for this kagome system [J. Ortega et al., unpublished] reveal the presence of a flat-band just below the Fermi level, making this novel system a compelling platform for hole-doping studies of magnetic and/or superconducting instabilities.