VSE knjižnice (vzajemna bibliografsko-kataložna baza podatkov COBIB.SI)
  • Laser-induced hole coherence and spatial self-phase modulation in the anisotropic 3D weyl semimetal TaAs [Elektronski vir]
    Huang, Yixuan ...
    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 = 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.
    Vir: Advanced materials [Elektronski vir]. - ISSN 1521-4095 (Vol. 35, iss. 11, Mar. 2023, [article no.] 2208362, str. 1-7)
    Vrsta gradiva - e-članek ; neleposlovje za odrasle
    Leto - 2023
    Jezik - angleški
    COBISS.SI-ID - 179376131

    Povezava(-e):

    https://onlinelibrary.wiley.com/doi/pdf/10.1002/adma.202208362
    DOI

Vnos na polico