Journal
APPLIED PHYSICS LETTERS
Volume 91, Issue 20, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2805196
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The mechanical and electronic properties of hcp-ReB2 are calculated by a first-principles approach. The calculated extreme equilibrium mechanical properties are consistent with the available experimental and theoretical data. The calculated elastic moduli suggest that hcp-ReB2 has a low compressibility and is most likely an intrinsically brittle material, but its relatively low ideal shear strength, as compared with c-BN, indicates that it is not intrinsically stronger/harder than c-BN. Based on the calculated electronic density of states and valence charge density distribution, the bonding nature of hcp-ReB2 is examined to obtain a deeper insight into the physical origin of the mechanical properties. (c) 2007 American Institute of Physics.
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