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    題名: Three-dimensional ultrafast charge-density-wave dynamics in CuTe
    作者: Hsu, Chih-en;Lin, I-an;Hsueh, Hung-chung
    日期: 2024-03-16
    上傳時間: 2024-07-31 12:11:52 (UTC+8)
    摘要: Charge density waves (CDWs) involved with electronic and phononic sub\x{FFFE}systems simultaneously are a common quantum state in solid-state physics,
    especially in low-dimensional materials. However, CDW phase dynamics in
    various dimensions are yet to be studied, and their phase transition mechan\x{FFFE}ism is currently moot. Here we show that using the distinct temperature
    evolution of orientation-dependent ultrafast electron and phonon dynamics,
    different dimensional CDW phases are verified in CuTe. When the temperature
    decreases, the shrinking of c-axis length accompanied with the appearance of
    interchain and interlayer interactions causes the quantum fluctuations (QF) of
    the CDW phase until 220 K. At T < 220 K, the CDWs on the different ab-planes
    are finally locked with each other in anti-phase to form a CDW phase along the
    c-axis. This study shows the dimension evolution of CDW phases in one CDW
    system and their stabilized mechanisms in different temperature regimes.
    關聯: Nature Communications 15,　2386
    DOI: 10.1038/s41467-024-46615-y
    顯示於類別:[物理學系暨研究所] 期刊論文

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