About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Neutron and X-ray Scattering in Materials Science
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Presentation Title |
Mutual Spin-phonon Driving Effects and Phonon Eigenvector Renormalization in Nickel (II) Oxide |
Author(s) |
Qiyang Sun, Bin Wei, Yaokun Su, Hillary Smith, Jiao Lin, Douglas L Abernathy, Chen Li |
On-Site Speaker (Planned) |
Qiyang Sun |
Abstract Scope |
The physics of mutual interaction of phonon quasiparticles with electronic spin degrees of freedom, leading to unusual transport phenomena of spin and heat, has been a subject of continuing interests for decades. The effect of spin-phonon coupling on the phonon system, especially acoustic phonon properties, has so far been elusive.
By means of inelastic neutron scattering and first-principles calculations, anomalous scattering spectral intensity from acoustic phonons was identified in the exemplary collinear antiferromagnetic nickel (II) oxide. A clear magnetic scattering signature of the measured neutron scattering intensity from acoustic phonons is demonstrated by its momentum transfer and temperature dependences, suggesting the presence of spin precession driven by phonon. The renormalization of phonon eigenvector is indicated by the observed “geometry-forbidden” neutron scattering intensity from transverse acoustic phonon. Our results provide a new approach to identify and quantify strong spin-phonon interactions, shedding lights on engineering functional spin-caloritronic materials through these interactions. |
Proceedings Inclusion? |
Planned: |
Keywords |
Magnetic Materials, Modeling and Simulation, Other |