Thresholdless behavior and linearity of the optically induced metallization of NbO2Thresholdless behavior and linearity of the optically induced metallization of NbO2
Thresholdless behavior and linearity of the optically induced metallization of NbO2Thresholdless behavior and linearity of the optically induced metallization of NbO2
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NbO2 光致金属化的无阈值行为和线性 NbO2 光致金属化的无阈值行为和线性
DOI：
10.1103/physrevresearch.1.033168
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
and Jean-Jacques Delaunay
中科院分区：
文献类型：
--
作者：
J. Kenji Clark;Ya-Lun Ho;Hiroaki Matsui;Hitoshi Tabata;and Jean-Jacques DelaunayJ. Kenji Clark;Ya-Lun Ho;Hiroaki Matsui;Hitoshi Tabata;and Jean-Jacques Delaunay
光激发的是已知的诱导一个短暂的金属性，部分恢复亚皮秒的速度，只有完全恢复后，几纳秒。在这里，通过低注量泵浦探测光谱，的光致调制的短寿命和长寿命的组件被发现是线性依赖于泵注量在低注量制度。通过深入的分析，短寿命和长寿命的调制被发现是由光载流子引起的折射率变化和光热引起的晶格温度的变化，分别，而不是绝缘体-金属过渡。
The optical excitation ofis known to induce a transient metallicity that partially recovers on a subpicosecond speed and only fully recovers after several nanoseconds. Here, through low-fluence pump-probe spectroscopy, the short-lived and long-lived components of’s optically induced modulation are found to be linearly dependent on pump fluence in the low-fluence regime. Through an in-depth analysis, the short-lived and long-lived modulations are found to be caused by photocarrier-induced refractive index changes and photothermally induced changes in the lattice temperature of, respectively, and not an insulator-metal transition.