Nonrelativistic nambu-goldstone modes associated with spontaneously broken space-time and internal symmetries

Michikazu Kobayashi, Muneto Nitta

研究成果: Article査読

22 被引用数 (Scopus)

抄録

We show that a momentum operator of a translational symmetry may not commute with an internal symmetry operator in the presence of a topological soliton in nonrelativistic theories. As a striking consequence, there appears a coupled Nambu-Goldstone mode with a quadratic dispersion consisting of translational and internal zero modes in the vicinity of a domain wall in an O(3) σ model, a magnetic domain wall in ferromagnets with an easy axis.

本文言語English
論文番号120403
ジャーナルPhysical review letters
113
12
DOI
出版ステータスPublished - 2014 9 18

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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