2003/11/30 by Y. Harada, Yoshihisa Harada, T. Tokushima +12 · 2 citations
Engineering · Materials Science · Physics and Astronomy · #Electron and X-Ray Spectroscopy Techniques #Ion-surface interactions and analysis #X-ray Spectroscopy and Fluorescence Analysis #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevlett.93.017401
published as Phys. Rev. Lett. 93, 017401 (2004) · 9 pages, 4 figures
arxiv created 2003/11/30 · openalex publication_date 2004/06/28 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
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 \ensuremathσ* core exciton state. This indicates a large local lattice distortion around the excited carbon atom within a core hole lifetime (\ensuremath∼10 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.