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High pressure studi...
High pressure studies of alkali metal doped fullerides A4C60
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- Sundqvist, Bertil (author)
- Umeå universitet,Institutionen för fysik
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- Wågberg, Thomas (author)
- Umeå universitet,Institutionen för fysik
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- Yao, Mingguang (author)
- Umeå universitet,Institutionen för fysik
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(creator_code:org_t)
- Elsevier, 2011
- 2011
- English.
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In: Diamond and Related Materials, Volume 20, issue 4. - : Elsevier. ; , s. 600-603
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Abstract
Subject headings
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- 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.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- Alkali metal fullerides
- C60
- intercalation
- K4C60
- Li4C60
- ionic conduction
- resistivity
- conductivity
- electronic conduction
- high pressure
- Raman spectroscopy
- X-ray diffraction
- Condensed matter physics
- Kondenserade materiens fysik
- fysik
- Physics
Publication and Content Type
- ref (subject category)
- kon (subject category)
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