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BIBTEX RIS

Bonding Nature in MgB 2

2001; Physical Society of Japan; Volume: 70; Issue: 8 Linguagem: Inglês

10.1143/jpsj.70.2252

ISSN

1347-4073

Autores

Eiji Nishibori, Masaki Takata, Makoto Sakata, Hiroshi Tanaka, Takahiro Muranaka, Jun Akimitsu,

Tópico(s)

Thermal Expansion and Ionic Conductivity

Resumo

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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