High-resolution x-ray absorption studies of core excitons in hexagonal boron nitride

被引：17

作者：

Li, Lu Hua ^{[1
]}

Petravic, Mladen ^{[2
,3
]}

Cowie, Bruce C. C. ^{[4
]}

Xing, Tan ^{[1
]}

Peter, Robert ^{[2
,3
]}

Chen, Ying ^{[1
]}

Si, Chen ^{[5
]}

Duan, Wenhui ^{[5
]}

机构：

[1] Deakin Univ, Inst Frontier Mat, Geelong, Vic 3216, Australia

[2] Univ Rijeka, Dept Phys, Rijeka 51000, Croatia

[3] Univ Rijeka, Ctr Micro & Nano Sci & Technol, Rijeka 51000, Croatia

[4] Australian Synchrotron, Clayton, Vic 3168, Australia

[5] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2012年 / 101卷 / 19期

关键词：

boron compounds; excitons; Franck-Condon factors; III-V semiconductors; Jahn-Teller effect; photoluminescence; vibrational modes; wide band gap semiconductors; XANES; SYMMETRY-BREAKING; BAND-STRUCTURE; EDGE; BN; IDENTIFICATION; SPECTROSCOPY; GRAPHITE; EMISSION; SPECTRUM; YIELD;

D O I：

10.1063/1.4767135

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In the K-shell excitation spectroscopy studies of hexagonal boron nitride, a sharp pi* resonance at 192.0 eV in the B K-edge region due to the B 1s-pi* transition has been widely observed and accepted for three decades. However, our high-resolution near-edge x-ray absorption fine-structure studies disclose that this characteristic exciton peak actually consists of an asymmetric double-peak structure. Notable differences have been revealed in the polarization character of the two split peaks. These fine structures are explained by the coupling of core excitons to lattice vibrations with the inclusion of Jahn-Teller effect which breaks down Franck-Condon principle. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4767135]

引用

页数：4

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