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

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 01期

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

页码：017401 / 1

页数：4

共 23 条

[1] CARBON-1S NEAR-EDGE-ABSORPTION FINE-STRUCTURE IN GRAPHITE [J].