Li, Junxue; Simensen, Haakon T.; Reitz, Derek; Sun, Qiyang; Yuan, Wei; Li, Chen; Tserkovnyak, Yaroslav; Brataas, Arne; Shi, Jing
Observation of Magnon Polarons in a Uniaxial Antiferromagnetic Insulator Journal Article
In: Phys. Rev. Lett. , vol. 125, pp. 217201, 2020.
Abstract | Links | BibTeX | Tags: antiferromagnetic, magnon, magnon-phonon, polaron
@article{Li2020b,
title = {Observation of Magnon Polarons in a Uniaxial Antiferromagnetic Insulator},
author = {Junxue Li and Haakon T. Simensen and Derek Reitz and Qiyang Sun and Wei Yuan and Chen Li and Yaroslav Tserkovnyak and Arne Brataas and Jing Shi},
url = {https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.125.217201},
doi = {10.1103/PhysRevLett.125.217201},
year = {2020},
date = {2020-11-17},
journal = {Phys. Rev. Lett. },
volume = {125},
pages = {217201},
abstract = {Magnon polarons, a type of hybridized excitations between magnons and phonons, were first reported in yttrium iron garnet as anomalies in the spin Seebeck effect responses. Here, we report an observation of antiferromagnetic (AFM) magnon polarons in a uniaxial AFM insulator Cr2O3. Despite the relatively higher energy of magnon than that of the acoustic phonons, near the spin-flop transition of ∼6T, the left-handed magnon spectrum shifts downward to hybridize with the acoustic phonons to form AFM magnon polarons, which can also be probed by the spin Seebeck effect. The spin Seebeck signal is founded to be enhanced due to the magnon polarons at low temperatures.},
keywords = {antiferromagnetic, magnon, magnon-phonon, polaron},
pubstate = {published},
tppubtype = {article}
}
Magnon polarons, a type of hybridized excitations between magnons and phonons, were first reported in yttrium iron garnet as anomalies in the spin Seebeck effect responses. Here, we report an observation of antiferromagnetic (AFM) magnon polarons in a uniaxial AFM insulator Cr2O3. Despite the relatively higher energy of magnon than that of the acoustic phonons, near the spin-flop transition of ∼6T, the left-handed magnon spectrum shifts downward to hybridize with the acoustic phonons to form AFM magnon polarons, which can also be probed by the spin Seebeck effect. The spin Seebeck signal is founded to be enhanced due to the magnon polarons at low temperatures.