Higgs and Goldstone spin-wave modes in striped magnetic texture - Archive ouverte HAL
Article Dans Une Revue Physical Review B Année : 2022

Higgs and Goldstone spin-wave modes in striped magnetic texture

Résumé

Spontaneous symmetry breaking is ubiquitous in physics. Its spectroscopic signature consists in the softening of a specific mode upon approaching the transition from the high symmetry side and its subsequent splitting into a zero-frequency "Goldstone" mode and a non-zero-frequency "Higgs" mode. Although they determine the whole system dynamics, these features are difficult to address in practice because of their vanishing coupling to most experimental probes and/or their strong interaction with other fluctuations. In this work, we consider a periodic magnetic modulation occurring in a ferromagnetic film with perpendicular-to-plane magnetic anisotropy and directly observe its Goldstone and Higgs spin-wave modes at room temperature using microwave and optical techniques. This simple system constitutes a particularly convenient platform for further exploring the dynamics of symmetry breaking.
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Dates et versions

hal-03371103 , version 1 (08-10-2021)
hal-03371103 , version 2 (09-11-2022)

Identifiants

Citer

Matías Grassi, Moritz Geilen, Kosseila Ait Oukaci, Yves Henry, Daniel Lacour, et al.. Higgs and Goldstone spin-wave modes in striped magnetic texture. Physical Review B, 2022, 105 (9), pp.094444. ⟨10.1103/PhysRevB.105.094444⟩. ⟨hal-03371103v2⟩
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