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- W4313231690 endingPage "2208362" @default.
- W4313231690 startingPage "2208362" @default.
- W4313231690 abstract "Laser-induced electron coherence is a fascinating topic in manipulating quantum materials. Recently, it has been shown that laser-induced electron coherence in 2D materials can produce a third-order nonlinear optical response spatial self-phase modulation (SSPM), which has been used to develop a novel all-optical switching scheme. However, such investigations have mainly focused on electron coherence, whereas laser-induced hole coherence is rarely explored. Here, the observation of the optical Kerr effect in 3D Weyl semimetal TaAs flakes is reported. The nonlinear susceptibility (χ(3) ) is obtained, which exhibits a surprisingly high value (with χone-layer(3)[{bm{chi }}_{{bf one}{bm{ - }}{bf layer}}^{{bf (3)}}] = 9.9 × 10-9 e.s.u. or 1.4 × 10-16 m2 V-2 at 532 nm). This cannot be explained by the conventional electron mobility, but can be well understood by the unique high anisotropic hole mobility of TaAs. The wind-chime model and χ(3) carrier mobility correlation adequately explain the results, suggesting the crucial role of laser-induced nonlocal ac hole coherence. These observations extend the understanding of SSPM from 2D to 3D quantum materials with anisotropic carrier mobility and from electron coherence to hole coherence." @default.
- W4313231690 created "2023-01-06" @default.
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- W4313231690 date "2023-02-07" @default.
- W4313231690 modified "2023-10-17" @default.
- W4313231690 title "Laser‐Induced Hole Coherence and Spatial Self‐Phase Modulation in the Anisotropic 3D Weyl Semimetal TaAs" @default.
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- W4313231690 doi "https://doi.org/10.1002/adma.202208362" @default.
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