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- W3007641568 abstract "The zone-center ${E}_{2g}$ modes play a crucial role in ${mathrm{MgB}}_{2}$, controlling the scattering mechanisms in the normal state as well the superconducting pairing. Here, we demonstrate via first-principles quantum-field theory calculations that, due to the anisotropic electron-phonon interaction, a hot-phonon regime where the ${E}_{2g}$ phonons can achieve significantly larger effective populations than other modes, is triggered in ${mathrm{MgB}}_{2}$ by the interaction with an ultrashort laser pulse. Spectral signatures of this scenario in ultrafast pump-probe Raman spectroscopy are discussed in detail, revealing also a fundamental role of nonadiabatic processes in the optical features of the ${E}_{2g}$ mode." @default.
- W3007641568 created "2020-03-06" @default.
- W3007641568 creator A5002388447 @default.
- W3007641568 creator A5050465632 @default.
- W3007641568 creator A5053264793 @default.
- W3007641568 creator A5075383999 @default.
- W3007641568 date "2020-02-21" @default.
- W3007641568 modified "2023-10-14" @default.
- W3007641568 title "Ultrafast Hot Phonon Dynamics in <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi>MgB</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math> Driven by Anisotropic Electron-Phonon Coupling" @default.
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- W3007641568 doi "https://doi.org/10.1103/physrevlett.124.077001" @default.
- W3007641568 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/32142321" @default.
- W3007641568 hasPublicationYear "2020" @default.
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