摘要
By integrating pump-probe ultrafast spectroscopy with diamond anvil cell(DAC)technique,we demonstrate a time-resolved ultrafast dynamics study on non-equilibrium quasiparticle(QP)states in.SVo/rQi under high pressure.On-site in situ condition is realized,where both the sample and DAC have fixed position during the experiment.The QP dynamics exhibits a salient pressure-induced phonon bottleneck feature at 20GPa,which corresponds to a gap shrinkage in the electronic structure.A structural transition is also observed at 32 GPa.In addition,the slowest relaxation component reveals possible heat diffusion or pressure-controlled local spin fluctuation associated with the gap shrinkage.Our work enables precise pressure dependence investigations of ultrafast dynamics,paving the way for reliable studies of high-pressure excited state physics.
作者
Yanling Wu
Xia Yin
Jiazila Hasaien
Yang Ding
Jimin Zhao
吴艳玲;尹霞;加孜拉·哈赛恩;丁阳;赵继民(Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190;Center for High-Pressure Sciences and Technology Advanced Research,Beijing 100094;School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049;Songshan Lake Materials Laboratory,Dongguan 523808)
基金
Supported by the National Key Research and Development Program of China(Grant Nos.2017YFA0303603,2016YFA0300303,2018YFA0305703)
the National Natural Science Foundation of China(Grant Nos.11774408,11574383,11874075,U1530402)
the Strategic Priority Research Program of CAS(Grant No.XDB30000000)
the International Partnership Program of Chinese Academy of Sciences(Grant Nos.GJHZ1826,GJHZ1403)
the Beijing Natural Science Foundation(Grant No.4191003)
the Science Challenge Project(Grant No.TZ2016001)
the CAS Interdisciplinary Innovation Team.
