Measurement of collective excitations in VO2 by resonant inelastic x-ray scattering
Measurement of collective excitations in VO2 by resonant inelastic x-ray scattering
复制标题
通过共振非弹性 X 射线散射测量 VO2 中的集体激发
DOI：
10.1103/physrevb.94.161119
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发表时间：
2016
影响因子：
3.7
通讯作者：
L. Wray
中科院分区：
文献类型：
--
作者：
Haowei He;Alexander Gray;Alexander Gray;P. Granitzka;P. Granitzka;Jaewoo Jeong;N. Aetukuri;R. Kukreja;Lin Miao;Lin Miao;S. Breitweiser;Jinpeng Wu;Y. Huang;P. Olalde;J. Pelliciari;W. Schlotter;E. Arenholz;Thorsten Schmitt;M. Samant;S. Parkin;H. A. Dürr;L. Wray
作者：He，H;灰色，AX; Granitzka，P; Jeong，JW; Aetukuri，NP; Kukreja，R;苗族L;南卡罗来纳州布赖特韦瑟; Wu，J; Huang，YB; Olalde-Velasco，P; Pelliciari，J; Schlotter，WF; Arenholz，E;施密特，T; Samant，MG;帕金，SSP; Durr，HA; Los Angeles，LA|摘要：© 2016美国物理学会。二氧化钒作为自旋12电子系统受到广泛关注，由于强关联和巡回电子物理的组合，该系统在室温附近实现了金属-绝缘体转变。在这里，共振非弹性X射线散射被用来测量激发光谱的电荷和自旋自由度在钒L边缘在不同的偏振和温度条件下，揭示激发，大大不同于那些在光学测量中看到的。这些光谱编码的演变短程能量跨越金属-绝缘体过渡，包括低温外观的一个强有力的候选人的单重态-三重态激发的钒二聚体。
Author(s): He, H; Gray, AX; Granitzka, P; Jeong, JW; Aetukuri, NP; Kukreja, R; Miao, L; Breitweiser, SA; Wu, J; Huang, YB; Olalde-Velasco, P; Pelliciari, J; Schlotter, WF; Arenholz, E; Schmitt, T; Samant, MG; Parkin, SSP; Durr, HA; Wray, LA | Abstract: © 2016 American Physical Society. Vanadium dioxide is of broad interest as a spin-12 electron system that realizes a metal-insulator transition near room temperature, due to a combination of strongly correlated and itinerant electron physics. Here, resonant inelastic x-ray scattering is used to measure the excitation spectrum of charge and spin degrees of freedom at the vanadium L edge under different polarization and temperature conditions, revealing excitations that differ greatly from those seen in optical measurements. These spectra encode the evolution of short-range energetics across the metal-insulator transition, including the low-temperature appearance of a strong candidate for the singlet-triplet excitation of a vanadium dimer.