PI-ASTERISK AND SIGMA-ASTERISK EXCITONS IN C-1S ABSORPTION OF GRAPHITE

被引：218

作者：

BRUHWILER, PA

MAXWELL, AJ

PUGLIA, C

NILSSON, A

ANDERSON, S

MARTENSSON, N

机构：

[1] Department of Physics, Uppsala University, Box 530

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 74卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.74.614

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have studied the * and * threshold structures in the C 1s x-ray absorption spectrum of graphite using core level autoionization spectroscopy. We confirm that the * threshold feature is an exciton. We find that the prominent * feature is also excitonic, though it lies approximately 1 eV above the * threshold. This excited state is localized on a time scale of fs, even though it is degenerate with propagating states of the crystal. © 1995 The American Physical Society.

引用

页码：614 / 617

页数：4

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