About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Neutron and X-ray Scattering in Materials Science
|
Presentation Title |
Modification of Phonon Group Velocity in Doped Sapphire |
Author(s) |
Shuonan Chen, Javier E. Garay, Fariborz Kargar, Tao Hong, Alexander Balandin, Chen Li |
On-Site Speaker (Planned) |
Chen Li |
Abstract Scope |
Phonon plays an important role in thermal transport of materials. A more than 10% decrease in transverse acoustic phonon group velocity was observed in lightly Ti-doped sapphire using inelastic neutron scattering. Such modification of acoustic phonon group velocity was not shown in Cr-doped samples. We attribute the difference to the large local strain induced by Ti defects. Our results shed light on phonon engineering of bulk crystals and benefit the design of new materials with tailored thermal conductivity and other thermodynamic properties. |
Proceedings Inclusion? |
Planned: |
Keywords |
Computational Materials Science & Engineering, |