2001/05/29 by Eiji Nishibori, E. Nishibori, M. Takata +9 · 2 citations
Materials Science · Physics and Astronomy · #Boron and Carbon Nanomaterials Research #Superconductivity in MgB2 and Alloys #Thermal Expansion and Ionic Conductivity #cond-mat.mtrl-sci
paper · pdf · doi:10.1143/jpsj.70.2252
4 pages, 3 figures
arxiv created 2001/05/29 · openalex publication_date 2001/08/15 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
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.