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New pressure-induced phase in tetragonal two-dimensional polymeric C60
Physics Division, School of Technology, Aristotle University of Thessaloniki.
Physics Division, School of Technology, Aristotle University of Thessaloniki.
Physics Division, School of Technology, Aristotle University of Thessaloniki.
Physics Division, School of Technology, Aristotle University of Thessaloniki.
Vise andre og tillknytning
2001 (engelsk)Inngår i: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 63, nr 5, s. 54106-Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

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.

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2001. Vol. 63, nr 5, s. 54106-
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URN: urn:nbn:se:ltu:diva-10732DOI: 10.1103/PhysRevB.63.054106Lokal ID: 993c3a20-7113-11db-962b-000ea68e967bOAI: oai:DiVA.org:ltu-10732DiVA, id: diva2:983678
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Upprättat; 2001; 20061111 (ysko)Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2018-04-25bibliografisk kontrollert

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