Optical and acoustic phonons play a central role in solid-state physics. Acoustic phonons can be thought of either as Goldstone bosons, which arise from the breaking of the translational invariance, or as gauge bosons within a non-Abelian gauge theory framework. Nevertheless, optical phonons are left out. Spontaneous symmetry breaking provides a unified framework in which optical and acoustic phonons appear together. After a general overview of this subject, the concept was applied specifically to crystalline phase transitions. Goldstone and Higgs modes arise naturally as a result of spontaneous breaking of a global, continuous crystal symmetry and can be identified with acoustic and optical phonons, respectively.

Higgs and Goldstone modes in crystalline solids / Vallone, Marco - In: Encyclopedia of Condensed Matter Physics, 2nd Edition / Dr. Tapash Chakraborty. - ELETTRONICO. - [s.l] : Elsevier, 2023. - ISBN 9780128035818. [10.1016/B978-0-323-90800-9.00227-4]

Higgs and Goldstone modes in crystalline solids

Vallone, Marco
2023

Abstract

Optical and acoustic phonons play a central role in solid-state physics. Acoustic phonons can be thought of either as Goldstone bosons, which arise from the breaking of the translational invariance, or as gauge bosons within a non-Abelian gauge theory framework. Nevertheless, optical phonons are left out. Spontaneous symmetry breaking provides a unified framework in which optical and acoustic phonons appear together. After a general overview of this subject, the concept was applied specifically to crystalline phase transitions. Goldstone and Higgs modes arise naturally as a result of spontaneous breaking of a global, continuous crystal symmetry and can be identified with acoustic and optical phonons, respectively.
2023
9780128035818
Encyclopedia of Condensed Matter Physics, 2nd Edition
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2981385