The Fascinating Quantum World of One- and Two-dimensional Materials: Discovering Nature with Theory and Computation
일시 : 2024-10-30 16:00 ~
연사 : Steven Louie / UC Berkeley
담당 : Prof. Sunghoon Jung, Prof. Joonho Jang, Prof. Yongjoo Baek
장소 : 56동105호
Many phenomena in nature owe their emergence from the interactions of large number of particles. In condensed matter, many-body interaction and topological effects are often dominant in the quantum properties of reduced-dimensional systems. These effects lead to manifestation of counter-intuitive concepts and phenomena that may not be so prominent or have not been seen in the bulk. Their understanding and prediction are a challenging quantum many-body problem. In this talk, I present some fascinating quantum phenomena discovered in recent theoretical and computational studies of the topological and photo physics of atomically thin one- and two-dimensional materials. A number of interesting and unexpected behaviors have been found – e.g., strongly bound excitons (electron-hole pairs) with highly unusual properties and moiré behaviors; tunable magnetism and plasmonic properties; novel topological phases; prominent correlated 3- and 4-particle excitations; enhanced nonlinear optical responses; remarkable field-driven time-dependent effects, etc. – adding to the promise of these materials for exploration of new science and valuable applications.