Bonding Nature in MgB2

Details Bonding Nature in MgB2 Bonding Nature in MgB2

2001-05-29

arxiv.org/abs/cond-mat/0105555v1

Physics

Condensed Matter

Materials Science

4 pages, 3 figures

Scientific paper

10.1143/JPSJ.70.2252

The accurate charge density of MgB2 was observed at room temperature(R.T.) and 15K by the MEM(Maximum Entropy Method)/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 15K, which should be relating to superconductivity.

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