Polarization-analyzed resonant inelastic x-ray scattering of the orbital excitations in KCuF_3
Polarization-analyzed resonant inelastic x-ray scattering of the orbital excitations in KCuF_3
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KCuF_3 轨道激发的偏振分析共振非弹性 X 射线散射
DOI：
10.1103/physrevb.83.241101
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
Y. Endoh
中科院分区：
文献类型：
--
作者：
Ikeuchi;K. Kuzushita;T. Inami;K. Ohwada;M. Yoshida;I. Jarrige;N. Tatami;S. Niioka;D. Bizen;Y. Ando;J. Mizuki;S. Maekawa;Y. Endoh
我们报告了Cuedge共振非弹性X射线散射（RIXS）研究的轨道有序莫特绝缘体KCuF的轨道激发。通过对散射光子的偏振分析，成功地区分了理论之间的激发与到的激发。各自的激发的偏振依赖性解释的基础上的RIXS过程，产生观察激发的必要条件的对称性的唯象考虑。由于我们的偏振分析，我们能够测量对应于整个布里渊区的轨道自由度的轨道激发的动量依赖性。在我们的实验分辨率内，发现激发是无色散的。
We report a Cuedge resonant inelastic x-ray scattering (RIXS) study of the orbital excitations in the orbital-ordered Mott insulator KCuF. By performing the polarization analysis of the scattered photons, the excitation between theorbitals is successfully distinguished from the excitations fromto. The polarization dependence of the respective excitations is interpreted based on a phenomenological consideration of the symmetry of the RIXS process that yields a necessary condition for observing the excitations. Owing to our polarization analysis, we are able to measure the momentum dependence of the orbital excitation corresponding to the orbital degree of freedom over the whole Brillouin zone. The excitation is found to be dispersionless within our experimental resolution.