Electrical properties of the rhombohedral C60 polymers

• Electrical properties of polymerized fullerenes C60 are governed by the type of polymerization which is in turn determined by the initial (P or H) orientation of molecules, the pressure and the temperature of polymerization. The mixed tetragonal - rhombohedral polymerized structure shows a semiconductor-like behavior. An increase in the polymerization temperature results in a decrease in the activation energy and an increase in conductivity. The conductivity prefactor and the activation energy are interconnected by the Meyer-Neldel rule. The pure rhombohedral phase shows highly anisotropic electrical properties. The conductivity in the polymerized (111) planes exhibits a metal-insulator transition and shows the features of 2D weak localization.

Ämnesord

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

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

Nyckelord

Fullerenes

C60

high pressure synthesis

polymerization

resistivity

conductivity

tetragonal phase

rhombohedral phase

fullerene polymers

semiconductor

semiconductor-metal transition

Meyer-Neldel rule

Condensed matter physics

Kondenserade materiens fysik

fysik

Physics

Publikations- och innehållstyp

ref (ämneskategori)

kon (ämneskategori)