摘要
Controlling collective electronic states hold great promise for development of innovative devices. Here, we experimentally detect the modification of the charge density wave(CDW) phase transition within a 1T-TaS_(2) layer in a WS_(2)/1T-TaS_(2) heterostructure using time-resolved ultrafast spectroscopy. Laser-induced charge transfer doping strongly suppresses the commensurate CDW phase, which results in a significant decrease in both the phase transition temperature(T_(c)) and phase transition stiffness. We interpret the phenomenon that photoinduced hole doping, when surpassing a critical threshold value of ~ 10^(18)cm^(-3), sharply decreases the phase transition energy barrier. Our results provide new insights into controlling the CDW phase transition, paving the way for optical-controlled novel devices based on CDW materials.
作者
王瑞
丁建伟
孙飞
赵继民
裘晓辉
Rui Wang;Jianwei Ding;Fei Sun;Jimin Zhao;Xiaohui Qiu(Beijing Information Technology College,Beijing 100015,China;CAS Key Laboratory of Standardization and Measurement for Nanotechnology,CAS Center for Excellence in Nanoscience,National Center for Nanoscience and Technology,Beijing 100190,China;Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China;Max Planck Institute for Chemical Physics of Solids,Dresden 01187,Germany;Songshan Lake Materials Laboratory,Dongguan 523808,China)
基金
supported by the National Key Research and Development Program of China (Grant No. 2021YFA1400201)
the CAS Project for Young Scientists in Basic Research (Grant No. YSBR059)
the Beijing Natural Science Foundation (Grant No. 4191003)
the National Natural Science Foundation of China (Grant No. 11774408)
the Scientific Instrument Developing Project of the Chinese Academy of Sciences (Grant No. GJJSTD20200005)
the Strategic Priority Research Program of Chinese Academy of Sciences (Grant Nos. XDB36000000 and XDB30000000)
the International Partnership Program of Chinese Academy of Sciences (Grant No. GJHZ1826)
CAS Interdisciplinary Innovation Team。
