Features of dependence of Raman spectra of cluster structures of three-dimensionally polymerized fullerite on pressure
At a Glance
Section titled “At a Glance”| Metadata | Details |
|---|---|
| Publication Date | 2022-01-01 |
| Journal | Физика твердого тела |
| Authors | Khorobrykh F.S., Churkin Valentin D., Mikhail Popov |
| Institutions | Moscow Aviation Institute, Technological Institute for Superhard and Novel Carbon Materials |
| Citations | 1 |
Abstract
Section titled “Abstract”We study the effect of high hydrostatic pressure on 3D polymerized fullerite C 60 . We do not observe further structural changes until 150 GPa after a formation of 3D C 60 under hydrostatic pressure 28 GPa. It is experimentally shown that the obtained samples consist of different clusters formed by sp 3 bonds with a different set of force constants, the values of which vary within 20% and exceed the diamond force constants by the factor of 1.3-1.5. The influence of the exposure of laser radiation on the process of 3D polymerization of C 60 under pressure was found. Increasing of the exposure by the factor of 15 leads to a decrease in the bulk modulus of 3D C 60 from 610 GPa to 504 GPa. Keywords: bulk modulus, ultrahard fullerite, high pressures, Raman spectroscopy.