New pressure-induced phase in tetragonal two-dimensional polymeric C60
2001 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 63, no 5, 54106- p.Article in journal (Refereed) Published
The behavior of the phonon modes of the tetragonal phase of the two-dimensional polymerized C60 has been studied as a function of pressure, up to 27.5 GPa, at room temperature by means of Raman spectroscopy. Gradual transformation of the material to a new phase was observed in the pressure region 19.0–21.0 GPa. As a result of this phase transformation dramatic changes in the Raman spectrum have been recorded. Namely, the total number of bands was reduced and a number of very strong peaks appeared. The Raman spectrum characteristics provide strong indication that the fullerene molecular cage is retained and therefore the high-pressure phase may be related to a three-dimensionally polymerized C60 phase. The high-pressure phase remains stable upon pressure decrease from 27.5 down to 9 GPa. Further release of pressure leads to the destruction of this high-pressure phase to a highly disordered structure whose broad features in the Raman spectrum resemble those of amorphous carbon.
Place, publisher, year, edition, pages
2001. Vol. 63, no 5, 54106- p.
Research subject Fysik
IdentifiersURN: urn:nbn:se:ltu:diva-10732DOI: 10.1103/PhysRevB.63.054106Local ID: 993c3a20-7113-11db-962b-000ea68e967bOAI: oai:DiVA.org:ltu-10732DiVA: diva2:983678
Upprättat; 2001; 20061111 (ysko)2016-09-292016-09-29