Bonding Nature in MgB2

Bonding Nature in MgB2
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MgB2 的结合性质

DOI:
10.1143/jpsj.70.2252
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发表时间:
2001
影响因子:
1.7
通讯作者:
J. Akimitsu
J. Akimitsu
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
E. Nishibori;M. Takata;M. Sakata;Hiroshi Tanaka;T. Muranaka;J. Akimitsu

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在室温(R.T.)下观测到了准确的MgB 2电荷密度.和15 K的最大熵方法(MEM)/Rietveld分析使用同步辐射粉末数据。所得电荷密度清晰地揭示了硼在基面形成二维蜂窝状网络的共价键特征,另一方面,发现Mg处于二价状态。在15 K下,在硼二维片上发现了一个微妙但清晰的电荷浓度,这应该与超导性有关。
The accurate charge density of MgB 2 was observed at room temperature (R.T.) and 15 K by the maximum entropy method (MEM)/Rietveld analysis using synchrotron radiation powder data. The obtained charge density clearly revealed the covalent bonding feature of boron forming the 2D honeycomb network in the basal plane, on the other hand, Mg is found to be in divalent state. A subtle but clear charge concentration was found on boron 2D sheets at 15 K, which should be related to superconductivity.
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