Myungchul Oh

Affiliation: POSTECH (Pohang University of Science and Technology)

Research Interests: Condensed Matter Physics, Quantum Materials

Title: Correlated Phases in Two-dimensional Twisted Moiré Materials

Abstract: In a flat band system, interactions between electrons become dominent due to the suppressed kinetic energy and many-body effect begins to occur. The recent breakthrough in engineering the band structure by creating a moiré superlattice in a twisted two-dimensional system has paved the way for the exploration of numerous strongly correlated quantum phenomena that emerge from the symmetry broken many-body ground state, such as correlated insulators, non-trivial topological phases, and unconventional superconductors [1-4].
In this talk, I will discuss the moiré superlattice flat band engineering in twisted two-dimensional van der Waals heterostructure and the correlated phases in the moiré superlattice systems, and describe underlying many-body physics in those phases.
I will also highlight the novel scanning probe microscopy technique that has enhanced our understanding of the microscopic electronic structures of their ground states [2,4,5].
At the end of this talk, I will discuss on prospects of twisted two-dimensional systems putting recent research progress together.