Bond switching from two- to three-dimensional polymers of C-60 at high pressure

Article

关键词: RAY STRUCTURAL REFINEMENT;    FULLERITE;    PHASE;    FULLERENES;    CARBON;   

DOI  :  10.1103/PhysRevB.68.153402

来源: SCIE

【 摘 要 】

In situ high pressure x-ray diffraction experiments revealed that a transformation from the two-dimensional (2D) tetragonal C-60 polymer to a three-dimensional (3D) polymer takes place via a highly anisotropic deformation of C-60 molecules along the c axis, as an irreversible first-order transformation above 20 GPa. In the 3D polymer phase, the 2+2 bonds remain in the 2D plane, while neighboring layers are connected by the 3+3 bonds. The bulk modulus of the 3D polymer was 407 GPa, being slightly smaller than that of diamond.

【 授权许可】

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