Amplitude Higgs mode in the 2H-NbSe2 superconductor
By M. Measson, Y. Gallais, M. Cazayous, Bertrand Clair, P. Rodière, L. Cario, A. Sacuto. 2014
138 citations recorded by the source corpus.
We report experimental evidence for the observation of the superconducting amplitude mode, the so-called "Higgs" mode, in the charge density wave superconductor 2H-NbSe2 using Raman scattering. By comparing 2H-NbSe2 and its isostructural partner 2H-NbS2 which shows superconductivity but lacks the charge density wave order, we demonstrate that the superconducting mode in 2H-NbSe2 owes its spectral weight to the presence of the coexisting charge density wave order. In addition, temperature dependent measurements in 2H-NbSe2 show a full spectral weight transfer from the charge density wave mode to the superconducting mode upon entering the superconducting phase. Both observations are fully consistent with a superconducting amplitude mode or Higgs mode.
Subfields: Condensed Matter Physics, Electronic, Optical and Magnetic Materials
View Paper: https://www.semanticscholar.org/paper/88af2153a86693767b2019d696103d7a46b4965b
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In Condensed Matter Physics
In Electronic, Optical and Magnetic Materials
Citations in the corpus
- Ultrafast optical spectroscopy of strongly correlated materials and high-temperature superconductors: a non-equilibrium approach (2016, methodology): “Indeed, a collective mode attributed to the Higgs AM was recently measured in NbSe2 through Raman scattering [458].”