块体 1T-VSe2 中光诱导的集体电荷密度波动力学

IF 5.3 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

APL Materials Pub Date : 2024-07-10 DOI:10.1063/5.0204205

P. Sutar, D. Grabnar, D. Vengust, D. Svetin, E. Goreshnik, D. Mihailovic, T. Mertelj

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引用次数: 0

摘要

我们利用近红外和可见光激发，研究了体层 1T-VSe2 电荷密度波 (CDW) 相中与温度 (T) 和激发密度相关的超快近红外 (NIR) 瞬态反射动力学。数据揭示了传统非绝热 CDW 集体动力学的特征，其中相当快的电子阶次参数动力学显示出亚皮秒级的抑制和恢复。与 T 有关的较慢的 100 ps 动力学表明，各向同性的热传输由晶格自由度主导。

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Photo-induced collective charge-density-wave dynamics in bulk 1T-VSe2

We investigated temperature (T) and excitation density dependent ultrafast near-infrared (NIR) transient reflectivity dynamics in the charge density wave (CDW) phases of bulk layered 1T-VSe2 using NIR and visible excitations. The data reveal fingerprints of conventional non-adiabatic CDW collective dynamics with rather fast electronic order parameter dynamics showing sub-picosecond suppression and recovery. The slower T-dependent 100-ps dynamics indicates rather isotropic heat transport dominated by the lattice degrees of freedom.

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来源期刊

APL Materials NANOSCIENCE & NANOTECHNOLOGYMATERIALS SCIE-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

9.60

自引率

3.30%

发文量

199

审稿时长

2 months

期刊介绍： APL Materials features original, experimental research on significant topical issues within the field of materials science. In order to highlight research at the forefront of materials science, emphasis is given to the quality and timeliness of the work. The journal considers theory or calculation when the work is particularly timely and relevant to applications. In addition to regular articles, the journal also publishes Special Topics, which report on cutting-edge areas in materials science, such as Perovskite Solar Cells, 2D Materials, and Beyond Lithium Ion Batteries.