Evidence for Goldstone-like and Higgs-like structural modes in the model $\mathrm{Pb}{\mathrm{Mg}}_{1/3}{\mathrm{Nb}}_{2/3}{\mathrm{O}}_{3}$ relaxor ferroelectric - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Review B Année : 2020

Evidence for Goldstone-like and Higgs-like structural modes in the model $\mathrm{Pb}{\mathrm{Mg}}_{1/3}{\mathrm{Nb}}_{2/3}{\mathrm{O}}_{3}$ relaxor ferroelectric

Résumé

Effective Hamiltonian simulations are conducted to unveil the nature of the low-frequency polar modes in the prototype relaxor ferroelectric, Pb(Mg1/3Nb2/3)O3. Above the so-called T* temperature, only a single soft-mode exists, with its frequency increasing under heating. On the other hand, for temperatures lower than the freezing temperature, this single soft-mode splits into two modes, with one mode slightly changing its low resonant frequency while the other exhibiting a resonant frequency sharply increasing under cooling, in agreement with previous measurements. More importantly, we present evidences that these two modes can be regarded as Goldstone-like and Higgs-like modes, inherent to the Mexican-hat-form of the atomic displacement potential we also reveal here, therefore extending the types of systems exhibiting Higgs-boson characteristics to relaxor ferroelectrics.
Fichier non déposé

Dates et versions

hal-02966399 , version 1 (13-10-2020)

Identifiants

Citer

Sergey Prosandeev, Sergei Prokhorenko, Yousra Nahas, A. Al-Barakaty, L. Bellaiche, et al.. Evidence for Goldstone-like and Higgs-like structural modes in the model $\mathrm{Pb}{\mathrm{Mg}}_{1/3}{\mathrm{Nb}}_{2/3}{\mathrm{O}}_{3}$ relaxor ferroelectric. Physical Review B, 2020, 102 (10), pp.104110. ⟨10.1103/PhysRevB.102.104110⟩. ⟨hal-02966399⟩
30 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More