CONVENER

Pilkyung Moon (New York University in Shanghai, China)

MEMBERS

Moonjip Park (Hanyang University, Korea)

Youngkuk Kim (SKKU, Korea)

Jun-Won Rhim (Ajou Univ, Korea)

Nojoon Myoung (CU, Korea)

Hee Chul Park (Pukyong National University, Korea)

Joung-Real Ahn (SKKU, Korea)

Heejun Yang (KAIST, Korea)

Young Woo Son (KIAS, Korea)

Sejoong Kim (UST, Korea)

OVERVIEW

The stacking geometries of two-dimensional weak van der Waals materials provide various hidden orders in the electronic and magnetic properties of the materials. We can consider the unusual orders not only in commensurately stacked multilayers but in incommensurately stacked multilayers as well. The interference between the lattice periodicities of the constituent atomic layers generates a unique order which is known as a moire interference pattern. Most studies conducted so far have been focused on the systems having two-dimensional hexagonal moire interference patterns. In more general configurations, however, the interference between two or more periodicities will be able to form the order with various symmetries, such as quasicrystalline order or one-dimensional order. We will study electron scattering, electronic band formation, band topology, magnetic orders, and various physical properties in this Advanced Study Group. The aim of this Advanced Study Group provides the chance to share the novel ideas and to solve the problems through collaborations among the different approaches. We have a plan, at first, to set up the initiative problem related to the incommensurately stacked atomic layers and then to gather the branch problems through the brainstorming with all of members. There are a lot of derived phenomena by stacking 2 dimensional materials such as quasicrystal inflation pattern, multiferroic, superconductivity, and higher-order topological insulators. The grouping by overlapped topics and distinguished approaches should make synergies in collaborations. We will study the physical properties of the layered materials by topological band theory by the first principle calculation and symmetry analysis, optical transition, electron transport, field theoretical approach including interaction and disorder, and so on. Although the works are related to 2 the theoretical interests, most of all problems will be considered by experimental realization through advice of members in experiment. Some We expect that the on-offline hybridised meetings offer the more active and continuous coworks.