Magnon pair emission from a relativistic domain wall in antiferromagnets

Gen Tatara, Collins Ashu Akosa, Ruben M. Otxoa De Zuazola

研究成果: Article査読

4 被引用数 (Scopus)

抄録

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.

本文言語English
論文番号043226
ジャーナルPhysical Review Research
2
4
DOI
出版ステータスPublished - 2020 11月 12
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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