| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Structure and Dynamics of Metallic Glasses
|
| Presentation Title |
Atomic cooperativity in metallic glass |
| Author(s) |
Takeshi Egami |
| On-Site Speaker (Planned) |
Takeshi Egami |
| Abstract Scope |
The structure and dynamics of metallic glass is obviously determined by the interatomic potential. But the way it works is more complex than is usually assumed. The conventional view is the bottom-up approach in real space, starting with an atom and adding up more atoms. But such a self-centered approach misses the intricate nature of atomic cooperativity at medium-range of distances. A better approach is to go to reciprocal space, and to apply the potential equally to all atoms at once. Then we find that the ground state of the system is the density wave (DW) state which epitomizes atomic cooperativity. In the liquid state local thermal fluctuations limit the spatial extension of the DW state. This results in the medium-range order (MRO), which plays a major role in determining the structure and dynamics of metallic liquids and glasses. This work is supported by the US Department of Energy. |
| Proceedings Inclusion? |
Planned: |