TY - JOUR
T1 - An abnormal temperature dependence of conductivity in fullerene solids
AU - Sun, Yong
AU - Onwona-Agyeman, Boateng
AU - Miyasato, Tatsuro
PY - 2010/8
Y1 - 2010/8
N2 - An abnormal temperature dependence of conductivity has been observed in some fullerene solids, C60, C70, and C60H 36 within the temperature range 400-500 K. The temperature dependent conductivity measurements of these fullerene solids with various molecular diameters and moments of inertia indicate that the abnormal conductivity involves a molecular rotation effect in the fullerene solids. Conductivity measurements of the C60 solid samples prepared using various pressures indicate that the abnormal conductivity is also related to a variation of the energy band structure.We are proposing a model to explain this abnormal conductivity observed as that, a reversible annealing effect results in the releasing or trapping of holes in the deep energy levels induced by lattice defects. The contribution of these holes leads to the abnormal variation in the conductivity with temperature.
AB - An abnormal temperature dependence of conductivity has been observed in some fullerene solids, C60, C70, and C60H 36 within the temperature range 400-500 K. The temperature dependent conductivity measurements of these fullerene solids with various molecular diameters and moments of inertia indicate that the abnormal conductivity involves a molecular rotation effect in the fullerene solids. Conductivity measurements of the C60 solid samples prepared using various pressures indicate that the abnormal conductivity is also related to a variation of the energy band structure.We are proposing a model to explain this abnormal conductivity observed as that, a reversible annealing effect results in the releasing or trapping of holes in the deep energy levels induced by lattice defects. The contribution of these holes leads to the abnormal variation in the conductivity with temperature.
UR - http://www.scopus.com/inward/record.url?scp=77957857995&partnerID=8YFLogxK
U2 - 10.1143/JJAP.49.085103
DO - 10.1143/JJAP.49.085103
M3 - Article
AN - SCOPUS:77957857995
SN - 0021-4922
VL - 49
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
IS - 8 PART 1
M1 - 085103
ER -