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- W4381569559 abstract "The type-II Weyl semimetal (WSM) $ensuremath{beta}text{-W}{mathrm{P}}_{2}$ was recently demonstrated as a supreme quantum material with various interestingtransport properties. Toward deciphering these peculiar transport phenomena for future topological device applications, it is highly necessary to understand the dynamical process of phonon scatterings under nonequilibrium conditions. By performing temperature-dependent coherent phonon spectroscopy in $ensuremath{beta}text{-W}{mathrm{P}}_{2}$, we provide here direct experimental evidence that phonons decaying into electron-hole pairs overwhelm the anharmonic phonon-phonon scattering process. Remarkably, the dominating phonon-electron coupling in $ensuremath{beta}text{-W}{mathrm{P}}_{2}$ is further supported by observations of the transient Fano resonance. First-principles calculations suggest that the anomalous phonon decaying results from the acoustic bunching and the limited phonon density of states in $ensuremath{beta}text{-W}{mathrm{P}}_{2}$. Our real-time observations provide dynamical insight into quasiparticle scatterings that are of vital importance for fundamental transport properties in $ensuremath{beta}text{-W}{mathrm{P}}_{2}$." @default.
- W4381569559 created "2023-06-22" @default.
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- W4381569559 date "2023-05-30" @default.
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- W4381569559 title "Anomalous nonequilibrium phonon scattering in the Weyl semimetal <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mi mathvariant=normal>W</mml:mi><mml:msub><mml:mi mathvariant=normal>P</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>" @default.
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- W4381569559 doi "https://doi.org/10.1103/physrevresearch.5.023137" @default.
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