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Condensed Matter > Superconductivity

arXiv:1906.09401 (cond-mat)
[Submitted on 22 Jun 2019]

Title:Higgs Mode in Superconductors

Authors:Ryo Shimano, Naoto Tsuji
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Abstract:When a continuous symmetry of a physical system is spontaneously broken, two types of collective modes typically emerge: the amplitude and phase modes of the order-parameter fluctuation. For superconductors, the amplitude mode is recently referred to as the ''Higgs mode'' as it is a condensed-matter analogue of a Higgs boson in particle physics. Higgs mode is a scalar excitation of the order parameter, distinct from charge or spin fluctuations, and thus does not couple to electromagnetic fields linearly. This is why the Higgs mode in superconductors has evaded experimental observations over a half century after the initial theoretical prediction, except for a charge-density-wave coexisting system. With the advance of nonlinear and time-resolved terahertz spectroscopy techniques, however, it has become possible to study the Higgs mode through the nonlinear light-Higgs coupling. In this review, we overview recent progresses on the study of the Higgs mode in superconductors.
Comments: 33 pages, 10 figures; a review article submitted to Annual Review of Condensed Matter Physics
Subjects: Superconductivity (cond-mat.supr-con); Strongly Correlated Electrons (cond-mat.str-el)
Cite as: arXiv:1906.09401 [cond-mat.supr-con]
  (or arXiv:1906.09401v1 [cond-mat.supr-con] for this version)
  https://doi.org/10.48550/arXiv.1906.09401
Journal reference: Annu. Rev. Condens. Matter Phys. 11, 103 (2020)
Related DOI: https://doi.org/10.1146/annurev-conmatphys-031119-050813

Submission history

From: Naoto Tsuji [view email]
[v1] Sat, 22 Jun 2019 07:06:43 UTC (3,195 KB)
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