Ultrafast hot carrier dynamics of ZrTe5 from time-resolved optical reflectivity
Ultrafast hot carrier dynamics of ZrTe5 from time-resolved optical reflectivity
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来自时间分辨光学反射率的 ZrTe5 超快热载流子动力学
DOI：
10.1103/physrevb.99.125141
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发表时间：
2019
影响因子：
3.7
通讯作者：
Liu H Y
中科院分区：
文献类型：
--
作者：
Zhang Xiu;Song Hai Ying;Nie X C;Liu Shi Bing;Wang Yang;Jiang Cong Ying;Zhao Shi Zhong;Chen Genfu;Meng Jian Qiao;Duan Yu Xia;Liu H Y
我们利用超快时间分辨光学反射率研究了ZrTe 5 $的热载流子动力学。我们的研究结果揭示了声子介导的跨隙复合，与先前通过光电子能谱观察到的其温度依赖性的间隙性质一致。此外，在初始光激发后，两个不同的弛豫与扭结的功能得到了很好的解决，表明电子热化过程的复杂性。研究结果表明，关联多体效应对ZrTe 5 $的瞬态动力学行为起着重要的作用。
We investigate the hot carrier dynamics of ZrTe$_5$ by ultrafast time-resolved optical reflectivity. Our results reveal a phonon-mediated across-gap recombination, consistent with its temperature-dependent gap nature as observed previously by photoemission. In addition, two distinct relaxations with a kink feature right after initial photoexcitation are well resolved, suggesting the complexity of electron thermalization process. Our findings indicate that correlated many-body effects play important role for the transient dynamics of ZrTe$_5$.