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- W4383345388 abstract "Abstract We performed polarized reflection and transmission measurements on the layered conducting oxide PdCoO 2 thin films. For the ab-plane, an optical peak near Ω ≈ 750 cm−1 drives the scattering rate γ ∗ (ω) and effective mass m ∗ (ω) of the Drude carrier to increase and decrease respectively for ω ≧ Ω. For the c-axis, a longitudinal optical phonon (LO) is present at Ω as evidenced by a peak in the loss function Im[−1/ε c (ω)]. Further polarized measurements in different light propagation (q) and electric field (E) configurations indicate that the Peak at Ω results from an electron-phonon coupling of the ab-plane carrier with the c-LO phonon, which leads to the frequency-dependent γ ∗ (ω) and m ∗ (ω). This unusual interaction was previously reported in high-temperature superconductors (HTSC) between a non-Drude, mid-infrared band and a c-LO. On the contrary, it is the Drude carrier that couples in PdCoO 2 . The coupling between the ab-plane Drude carrier and c-LO suggests that the c-LO phonon may play a significant role in the characteristic ab-plane electronic properties of PdCoO 2 including the ultra-high dc-conductivity, phonon-drag, and hydrodynamic electron transport." @default.
- W4383345388 created "2023-07-07" @default.
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- W4383345388 date "2023-07-06" @default.
- W4383345388 modified "2023-09-23" @default.
- W4383345388 title "Interaction of in-plane Drude carrier with c-axis phonon in PdCoO2" @default.
- W4383345388 doi "https://doi.org/10.21203/rs.3.rs-3061582/v1" @default.
- W4383345388 hasPublicationYear "2023" @default.
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