Bonding Nature in MgB2

Abstract

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.

4 pages, 3 figures

References in corpus (5)

• Superconductivity of metallic boron in MgB_2
• Compressibility and Electronic Structure of MgB2 up to 8 GPa
• Compressibility of the MgB2 Superconductor
• Two-Band-Type Superconducting Instability in MgB2
• Superconductivity Driven by the Interband Coulomb Interaction and Implications for the Superconducting Mechanism of MgB2

Cited by in corpus (10)

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• Effect of Net Charge on the Relative Stability of 2D Boron Allotropes
• X-ray photoelectron spectroscopy studies of non-stoichiometric superconducting NbB2+x
• Electronic Structure of B-2p State in AlB2 Single Crystal: Direct Observation ofpσand pπDensity of States
• Synthesis and photoemission study of as-grown superconducting MgB2 thin films
• Reaction method control of impurity scattering in C-doped MgB2, proving the role of defects besides C substitution level
• Electronic structure of single-crystalline Mg${}_x$Al${}_{1-x}$B${}_2$ probed by x-ray diffraction multipole refinements and polarization-dependent x-ray absorption spectroscopy