Raman spectroscopy of B12As2 and B12P2 up to 120 GPa: Evidence for structural distortion

Autor: V. Ovsyannikov, Sergey, Polian, Alain, Munsch, Pascal, Chervin, Jean-Claude, Le Marchand, Gilles, L. Aselage, Terrence
Přispěvatelé: Institut de minéralogie et de physique des milieux condensés (IMPMC), Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS), High Pressure Group [Ekaterinburg], M.N. Mikheev Institute of Metal Physics (IMP), Ural Branch of Russian Academy of Sciences (UB RAS)-Ural Branch of Russian Academy of Sciences (UB RAS), Sandia National Laboratories [Albuquerque] (SNL), Sandia National Laboratories - Corporation, Université Pierre et Marie Curie - Paris 6 (UPMC)-IPG PARIS-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)
Jazyk: angličtina
Rok vydání: 2010
Předmět:
Zdroj: Physical Review B: Condensed Matter and Materials Physics (1998-2015)
Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2010, 81, pp.140103. ⟨10.1103/PhysRevB.81.140103⟩
Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2010, 81, pp.140103. ⟨10.1103/PhysRevB.81.140103⟩
ISSN: 1098-0121
1550-235X
DOI: 10.1103/PhysRevB.81.140103⟩
Popis: International audience; Boron and boron-rich solids are materials with unusual structures. B12 distorted icosahedra are the primary building blocks of pure boron and many boron-rich solids. B atoms within icosahedra participate in strong covalent bonds with neighboring atoms in adjacent icosahedra and other struc- tural elements. As a consequence of this bonding, these com- pounds are very stable, with a melting temperature up to 2700 K. The bonding within icosahedra is metallike: internal bonding electrons are delocalized over the surface of each icosahedron with densities that peak at the centers of the triangular faces formed by three neighboring boron atoms. Such distinctive bonding has some extremely interesting consequences, such as self-healing resistance to radiation damage.1 Hence, the stability range of icosahedrally builded compounds presents interest both from fundamental and ap- plication points of view.
Databáze: OpenAIRE
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