High pressure studies of alkali metal doped fullerides A4C60
2011 (English)In: Diamond and Related Materials, Volume 20, issue 4: Proceedings of New Diamond and Nanocarbon 2010 (NDNC2010), Elsevier , 2011, 600-603 p.Conference paper (Refereed)
The electrical resistance R of K4C60 and Li4C60 has been measured between 100 and 300 K under pressures up to 1 and 2 GPa, respectively. For both materials, the temperature coefficient of R is negative at all pressures and temperatures in this range. The transport properties of Li4C60 at low pressure are compatible with a recent observation of high ionic conductivity, but surprisingly, this conductivity term increases strongly with increasing pressure, contradicting an intuitive model. For K4C60 we see no sign of a recently suggested structural phase transformation at low temperature, nor can we find any convincing evidence for a lattice disproportionation as recently observed for Rb4C60.
Place, publisher, year, edition, pages
Elsevier , 2011. 600-603 p.
Diamond and Related Materials, ISSN 0925-9635 ; Volume 20, issue 4
Alkali metal fullerides, C60, intercalation, K4C60, Li4C60, ionic conduction, resistivity, conductivity, electronic conduction, high pressure, Raman spectroscopy, X-ray diffraction
Condensed Matter Physics
Research subject Physics
IdentifiersURN: urn:nbn:se:umu:diva-43122DOI: 10.1016/j.diamond.2011.01.009ISI: 000291140200029OAI: oai:DiVA.org:umu-43122DiVA: diva2:411531
New Diamond and Nano Carbon 2010 (NDNC 2010), Suzhou, May 2010
FunderSwedish Research Council, 621-2010-3732