Possible polymerisation at dislocations in C-60 crystals

Citation
Dv. Dyachenko-dekov et al., Possible polymerisation at dislocations in C-60 crystals, PHYS ST S-B, 222(1), 2000, pp. 111-119
Citations number
28
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA STATUS SOLIDI B-BASIC RESEARCH
ISSN journal
03701972 → ACNP
Volume
222
Issue
1
Year of publication
2000
Pages
111 - 119
Database
ISI
SICI code
0370-1972(200011)222:1<111:PPADIC>2.0.ZU;2-W
Abstract
It is known that under hydrostatic pressures of about 1 GPa the polymerisat ion of molecules in C-60 crystals occurs in a temperature range of about 40 0-600 K. The same strain of a lattice can be achieved in the vicinity of a dislocation core. Therefore, one can suppose that the polymerisation of C-6 0 molecules can be possible in the vicinity of dislocations in C-60 crystal s at elevated temperature. Here we report the results of stress-strain meas urements made on C-60 single crystals and the photoluminescence (PL) spectr a of plastically deformed samples. A hardening of samples with increase of the deformation temperature from 20 to 300 degreesC was observed together w ith a strong enhancement of some defect-related lines in PL spectra. We sup pose that the appearance of covalently bonded Csa molecules at dislocations is a possible reason for that.