Phase transitions in C60·C8H8 under hydrostatic pressure

E. A. Francis, G. Durkó, I. Jalsovszky, G. Klupp, K. Kamarás, É Kováts, S. Pekker, C. A. Kuntscher

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Abstract

High-pressure infrared transmission measurements up to 9.5GPa were carried out on the rotor-stator molecular cocrystal C60·C8H8. Helium served as pressure transmitting medium, which intercalates into the C60·C8H8 lattice. Thus, we investigated the pressure effects and effect of intercalation of helium into the C60·C8H8 lattice. The pressure-induced shift of the vibrational modes of C60·C8H8 shows an anomaly around 3GPa. This anomaly can be interpreted in terms of the orientational ordering transition of fullerene molecules accompanied by a change in the crystal symmetry, which causes the splitting of the vibrational modes. We compare the value of the critical pressure to that obtained earlier [Thirunavukkuarasu et al., J. Phys. Chem. C 112, 17525 (2008); Phys. Status Solidi B 244, 3857 (2007)].

Original languageEnglish
Pages (from-to)2596-2599
Number of pages4
JournalPhysica Status Solidi (B) Basic Research
Volume249
Issue number12
DOIs
Publication statusPublished - Dec 1 2012

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Keywords

  • Fullerene-based materials
  • High pressure
  • Infrared spectroscopy
  • Phase transitions

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Francis, E. A., Durkó, G., Jalsovszky, I., Klupp, G., Kamarás, K., Kováts, É., Pekker, S., & Kuntscher, C. A. (2012). Phase transitions in C60·C8H8 under hydrostatic pressure. Physica Status Solidi (B) Basic Research, 249(12), 2596-2599. https://doi.org/10.1002/pssb.201200102