Cai, Qingan; Zhang, Yuemei; Luong, Diana; Tulk, Christopher A.; Fokwa, Boniface P. T.; Li, Chen
Spin–Phonon Interactions and Anharmonic Lattice Dynamics in Fe3GeTe2 Journal Article
In: Advanced Physics Research, no. 2200089, 2023.
Abstract | Links | BibTeX | Tags: anharmonicity, DFT, high pressure, magnon-phonon, Raman, selenide
@article{Cai2023,
title = {Spin\textendashPhonon Interactions and Anharmonic Lattice Dynamics in Fe3GeTe2},
author = {Qingan Cai and Yuemei Zhang and Diana Luong and Christopher A. Tulk and Boniface P.T. Fokwa and Chen Li},
url = {https://onlinelibrary.wiley.com/doi/10.1002/apxr.202200089},
doi = {10.1002/apxr.202200089},
year = {2023},
date = {2023-03-24},
urldate = {2023-03-24},
journal = {Advanced Physics Research},
number = {2200089},
abstract = {Raman scattering is performed on Fe3GeTe2 (FGT) at temperatures from 8 to 300 K and under pressures from the ambient pressure to 9.43 GPa. Temperature-dependent and pressure-dependent Raman spectra are reported. The results reveal respective anomalous softening and moderate stiffening of the two Raman active modes as a result of the increase of pressure. The anomalous softening suggests anharmonic phonon dynamics and strong spin\textendashphonon coupling. Pressure-dependent density functional theory and phonon calculations are conducted and used to study the magnetic properties of FGT and assign the observed Raman modes E^2_2g and A^1_1g. The calculations proved the strong spin\textendashphonon coupling for the E^2_2g mode. In addition, a synergistic interplay of pressure-induced reduction of spin exchange interactions and spin\textendashorbit coupling effect accounts for the softening of the E^2_2g mode as pressure increases.},
keywords = {anharmonicity, DFT, high pressure, magnon-phonon, Raman, selenide},
pubstate = {published},
tppubtype = {article}
}
Bansal, D; Hong, J; Li, Chen W; May, A F; Porter, W; Hu, M Y; Abernathy, D L; Delaire, O
Phonon anharmonicity and negative thermal expansion in SnSe Journal Article
In: Physical Review B, vol. 94, no. 5, pp. 054307, 2016.
Links | BibTeX | Tags: neutron, NTE, phonon, selenide, thermodynamics, thermoelectric
@article{Bansal:2016hd,
title = {Phonon anharmonicity and negative thermal expansion in SnSe},
author = {D Bansal and J Hong and Chen W Li and A F May and W Porter and M Y Hu and D L Abernathy and O Delaire},
url = {https://link.aps.org/doi/10.1103/PhysRevB.94.054307},
doi = {10.1103/PhysRevB.94.054307},
year = {2016},
date = {2016-01-01},
journal = {Physical Review B},
volume = {94},
number = {5},
pages = {054307},
keywords = {neutron, NTE, phonon, selenide, thermodynamics, thermoelectric},
pubstate = {published},
tppubtype = {article}
}
Li, Chen W; Hong, J; May, A F; Bansal, D; Chi, S; Hong, T; Ehlers, G; Delaire, O
Orbitally driven giant phonon anharmonicity in~SnSe Journal Article
In: Nature Physics, vol. 11, no. 12, pp. 1063–1069, 2015.
Links | BibTeX | Tags: anharmonicity, neutron, selenide, thermoelectric
@article{Li:2015gf,
title = {Orbitally driven giant phonon anharmonicity in~SnSe},
author = {Chen W Li and J Hong and A F May and D Bansal and S Chi and T Hong and G Ehlers and O Delaire},
url = {http://www.nature.com/doifinder/10.1038/nphys3492},
doi = {10.1038/nphys3492},
year = {2015},
date = {2015-01-01},
journal = {Nature Physics},
volume = {11},
number = {12},
pages = {1063--1069},
keywords = {anharmonicity, neutron, selenide, thermoelectric},
pubstate = {published},
tppubtype = {article}
}