Photoconductive detection of tetrahedrally coordinated hydrogen in ZnO.
Photoconductive detection of tetrahedrally coordinated hydrogen in ZnO.
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DOI：
10.1103/physrevlett.108.165501
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发表时间：
2012-04
影响因子：
8.6
通讯作者：
S. Koch;E. Lavrov;J. Weber
中科院分区：
文献类型：
--
作者：
S. Koch;E. Lavrov;J. Weber
在这封信中，我们采用了一种创新的实验方法，这使我们能够提高灵敏度检测本地振动模式（LVMs），即使在高吸收光谱区。这种光电导技术使我们能够证实最近提出的ZnO中氢的新的多中心键[A. Janotti和C. G.货车·德·瓦勒，自然之母。6，44（2007）]。在ZnO中氢取代氧的两个LVMs在742和792 cm（-1）处被确定。这些模分别属于C（3v）点群的非退化A（1）和双重退化E表示。氢原子的四面体配位是新发现的固体中缺陷的多中心键的结果。
In this Letter we apply an innovative experimental approach, which allows us to improve the sensitivity of detecting local vibrational modes (LVMs) even in highly absorbing spectral regions. This photoconductive technique allowed us to confirm a recent suggestion of a new multicenter bond for hydrogen in ZnO [A. Janotti and C. G. Van de Walle, Nature Mater. 6, 44 (2007)]. The two LVMs of the hydrogen substituting oxygen in ZnO are identified at 742 and 792 cm(-1). The modes belong to a nondegenerated A(1) and a twofold degenerated E representations of the C(3v) point group. The tetrahedral coordination of the hydrogen atom is the result of a newly detected multicenter bond for defects in solids.