Electron paramagnetic resonance study of type-II silicon clathrate with low sodium guest concentration
Electron paramagnetic resonance study of type-II silicon clathrate with low sodium guest concentration
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低钠客体浓度II型硅包合物的电子顺磁共振研究
DOI:
10.1103/physrevb.101.245204
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发表时间:
2020
影响因子:
3.7
通讯作者:
Collins, Reuben T.
中科院分区:
文献类型:
--
作者:
Schenken, William K.;Liu, Yinan;Krishna, Lakshmi;Majid, Ahmad A.;Koh, Carolyn A.;Taylor, P. Craig;Collins, Reuben T.
An electron paramagnetic resonance (EPR) study of type-II silicon (Si) clathrate with low sodium (Na) guest concentration provides insights into the properties of this cagelike Si allotrope and into Na as an-type dopant. An EPR line arising from unterminated Si bonds in a disordered Si phase is identified in the system. The presence of this amorphouslike component helps explain the thermally activated, hopping-related conductivity that has long been observed in the system but which has been poorly understood. This study also identifies “superhyperfine” lines surrounding each Na hyperfine line due to interactions of the donor electron with anucleus on the cage and confirms the identification of hyperfine lines due to interactions of two neighboring Na nuclei. Analysis of the strength of these interactions shows that the electron wave function associated with the Na donor extends onto surrounding cages consistent with identification of Na as a shallow donor, and provides quantitative evidence of Na clustering.
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DOI:
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发表时间:
1970
期刊:
影响因子:
--
作者:
P. Cullis;J. Marko
通讯作者:
J. Marko
影响因子:
3.5
作者:
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通讯作者:
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影响因子:
3.7
作者:
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通讯作者:
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DOI:
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发表时间:
1997
期刊:
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--
作者:
V. I. Smelyansky;J. Tse
通讯作者:
J. Tse
DOI:
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发表时间:
2011
期刊:
影响因子:
--
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通讯作者:
G. Nolas