TY - JOUR
T1 - Magnon pair emission from a relativistic domain wall in antiferromagnets
AU - Tatara, Gen
AU - Akosa, Collins Ashu
AU - Otxoa De Zuazola, Ruben M.
N1 - Publisher Copyright:
© 2020 authors..
PY - 2020/11/12
Y1 - 2020/11/12
N2 - Magnon emission and excitation by a relativistic domain wall at a constant velocity in antiferromagnets is theoretically studied. A pair emission due to a quadratic magnon coupling is shown to be dominant. The emission corresponds in the comoving frame to a vacuum polarization induced by a zero-energy instability of the Lorentz-boosted anomalous response function. The emission rate is sensitive to the magnon dispersion and wall profile, and is significantly enhanced for a thin wall with velocity close to the effective light velocity. The Ohmic damping constant due to magnon excitation at low velocity is calculated.
AB - Magnon emission and excitation by a relativistic domain wall at a constant velocity in antiferromagnets is theoretically studied. A pair emission due to a quadratic magnon coupling is shown to be dominant. The emission corresponds in the comoving frame to a vacuum polarization induced by a zero-energy instability of the Lorentz-boosted anomalous response function. The emission rate is sensitive to the magnon dispersion and wall profile, and is significantly enhanced for a thin wall with velocity close to the effective light velocity. The Ohmic damping constant due to magnon excitation at low velocity is calculated.
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U2 - 10.1103/PhysRevResearch.2.043226
DO - 10.1103/PhysRevResearch.2.043226
M3 - Article
AN - SCOPUS:85101852871
SN - 2643-1564
VL - 2
JO - Physical Review Research
JF - Physical Review Research
IS - 4
M1 - 043226
ER -