Electrical transport properties of A4C60 (A=Li,Na,Rb) under pressure

• In search of structural phase transformations, the electrical resistances of the alkali metal-intercalated fullerene compounds Li4C60, Na4C60, and Rb4C60 have been measured as functions of temperature and pressure. The compounds have different lattice structures, and in the first two, the fullerene molecules form two-dimensional covalently bonded polymer lattices. No phase changes could be identified over the ranges 100-400 K and 0-2 GPa. All materials are semiconducting under the conditions studied, and we see no strong dependence of the band gaps on pressure.

Ämnesord

NATURVETENSKAP  -- Fysik -- Den kondenserade materiens fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Condensed Matter Physics (hsv//eng)

Nyckelord

alkali fullerides

Li4C60

Na4C60

Rb4C60

resistance

conductance

resistivity

high pressure

low temperature

fulleride polymer

Condensed matter physics

Kondenserade materiens fysik

fysik

Physics

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