Electron Energy-Loss Spectroscopy Study of the Electronic Structure of Li- and V-Dopedβ-Rhombohedral Boron
Electron Energy-Loss Spectroscopy Study of the Electronic Structure of Li- and V-Dopedβ-Rhombohedral Boron
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锂、钒掺杂β-菱面体硼电子结构的电子能量损失谱研究
DOI：
10.1006/jssc.1997.7335
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发表时间：
1997
影响因子：
5.4
通讯作者：
K. Kimura
中科院分区：
文献类型：
--
作者：
M. Terauchi;Y. Kawamata;Michiyoshi Tanaka;H. Matsuda;K. Kimura
摘要 从直径为 180 nm 的完美晶体区域测量了 Li 和 V 掺杂的 β -rhombohedral boron ( β -r-B) 的电子能量损失光谱。 Li掺杂的β-r-B的光谱起始点在约1.5 eV处观察到，但V掺杂的β-r-B的光谱起始点没有清晰地观察到。 Li-和V-掺杂的β-r-B的体积等离子体峰分别在23.1和23.6 eV处观察到。 V掺杂β-r-B的B K壳层激发光谱的起始能量比β-r-B低0.9 eV。较低的起始值表明 V 掺杂导致带隙能量降低。在Li掺杂的β-r-B中没有观察到能量起始的这种降低。
Abstract Electron energy-loss spectra of Li- and V-doped β -rhombohedral boron ( β -r-B) were measured from perfect crystalline areas of 180 nm in diameter. The onset of spectra of Li-doped β -r-B was observed at about 1.5 eV, but that of V-doped β -r-B was not clearly observed. The volume plasmon peaks of Li- and V-doped β -r-B were observed at 23.1 and 23.6 eV, respectively. The energy onset of the B K-shell excitation spectra of V-doped β -r-B was lower than that of β -r-B by 0.9 eV. The lower onset indicates a decrease of the band gap energy with V-doping. Such a decrease of the energy onset was not observed in Li-doped β -r-B.