Dynamical symmetry breaking under core excitation in graphite: Polarization correlation in soft x-ray recombination emission

被引:34
作者
Harada, Y [1 ]
Tokushima, T
Takata, Y
Takeuchi, T
Kitajima, Y
Tanaka, S
Kayanuma, Y
Shin, S
机构
[1] RIKEN, Spring8, Sayo, Hyogo 6795148, Japan
[2] Tokyo Univ Sci, Shinjuku Ku, Tokyo 1628601, Japan
[3] High Energy Accelerator Res Org, Inst Mat Struct Sci, Photon Factory, Tsukuba, Ibaraki 3050801, Japan
[4] Osaka Prefecture Univ, Dept Mat Sci, Sakai, Osaka 5998531, Japan
[5] Osaka Prefecture Univ, Coll Engn, Sakai, Osaka 5998531, Japan
[6] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan
关键词
D O I
10.1103/PhysRevLett.93.017401
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
A recombination emission spectrum is applied to study the local lattice distortion due to core excitation in graphite. The recombination emission spectrum reveals a long low-energy tail when the C 1s electron is excited to the sigma(*) core exciton state. This indicates a large local lattice distortion around the excited carbon atom within a core hole lifetime (similar to10 fs). A theoretical calculation based upon an ionic cluster model reproduces the experiments well. The strong polarization correlation between incident and emitted x rays is conclusive evidence of symmetry breaking in the core exciton state due to coupling with asymmetric vibrational modes.
引用
收藏
页码:017401 / 1
页数:4
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