Topic: Engineering of topological magnons and magnon-phonon hybrid modes in magnetic vdW layers

Time: December 11, 2024, 10:00, UTC+8

Venue: Hubei Advanced Composite Materials Technology Innovation Center 224

Lecturer: Alireza Qaiumzadeh

Biography:

Alireza Qaiumzadeh is the senior researcher of Professor Arne Brataas’ team at the School of Physics, Norway University of Technology. His research interests cover material quantum theory and quantum technology, including quantum magnetism, spintronics, material topological phases and topological orders. He has published over 70 academic papers in authoritative journals such as Nature, Nature Communications (2), and Physical Review Letters (10).

Abstract:

The topological origin of the magnon gap in CrI3 remains a topic of active debate within the scientific community. In a series of recent studies, we propose that angular-dependent measurements of magnon dispersion and the magnon Nernst effect can serve as powerful tools to elucidate the underlying mechanisms of this topological magnon gap. Furthermore, we demonstrate that systems with emerging magnon-phonon hybrid modes can exhibit nontrivial states, featuring tunable topological Chern numbers. These findings highlight new opportunities for engineering topological phases in novel magnetic materials. In addition to this topic, I will provide a short overview of the diverse research directions pursued by my group, Emergent Phenomena in Quantum Matters at center for quantum spintronics (QuSpin) in NTNU with the aim of identifying potential areas for collaboration.

Rewritten by: Xu Hanyue

Edited by: Li Tiantian, Liang Muwei

Source: State Key Laboratory of Advanced Technology For Materials Synthesis and Processing