Scope of the workshop

In the past decades, knowledge of quantum matter has advanced through a series of dramatic and unexpected discoveries. In certain quantum materials, distinct states can arise without accompanying a broken symmetry or occur even though they share the same broken symmetry. Materials possessing these novel states are differentiated by the topological character of their wave functions and are named topological materials. Here the topology refers to their immunity to impurities and defects in solids and allows us to classify new classes of long-range entangled many-body quantum states in the absence of broken symmetry. These states appear as various types of matter such as metals, insulators, or superconductors in correlated systems. 

Quantum magnets offer a platform for exploring exotic phenomena beyond the scope of conventional magnets, which are typically defined by broken symmetry. These phenomena arise from the complex interplay between spins, orbitals, and their interactions with underlying lattices, exhibiting intriguing properties influenced by factors such as frustration, electronic correlations, dimensionality, effective spin-orbit coupling, and topology. These characteristics have been investigated through a range of experimental techniques and theoretical approaches. Simultaneously, the concept of topology in physics enables the classification of new classes of many-body quantum states that do not rely on broken symmetry. These states manifest in various forms of matter, including metals, insulators, and superconductors, particularly within correlated systems.

The international workshop on Quantum Magnetism and Topology (QMT) aims to bring together leading experts in the fields of quantum magnetic and topological materials, including both experimentalists and theorists. The first QMT workshop was successfully conducted in 2023 (https://sites.google.com/view/qmt2023/home). Building on the success of the first QMT workshop, we will have a second QMT workshop and continue our discussion for deeper understanding of novel phenomena in various quantum materials. The quantum materials under discussion will encompass, but are not limited to, magnetic semimetals with giant Hall conductivities, topological defects such as skyrmions, multipole moments beyond dipole spin or orbital moments, superconductivity in proximity to magnetic phases, and quantum spin liquids in Mott insulators. These materials not only hold significant potential for advancing quantum technology but also provide a platform for discovering new classes of fundamental particles. 

We would like to cover six topics under the theme of quantum magnetism and topology. These topics include:

1. Topological metals/insulators/superconductors

2. Frustrated magnetism and quantum spin liquids

3. Competition/cooperation between magnetism and superconductivity

4. Unconventional transport phenomena in quantum materials

5. Multipole physics/altermagnets in d- or f-electron systems

6. Advanced many-body numerical methods

All the oral presentations will be based on invited talks. As such, there will be no open call for oral presentations. We would like to remind you that the conference will also include poster presentations, and we encourage all participants to take advantage of this opportunity to showcase their research and engage with the colleagues. 

Important Date

• March 3, 2025 : Registration submission  

• March 21, 2025 : Abstract submission for invited speakers

• May 2, 2025 : Abstract submission for poster presentation

• May 2, 2025 : Registration due for general participants   

• June 18~20, 2025 : Workshop in Lahan Hotel, Pohang, Korea