Anomalous temperature dependence of persistent photoconductivity in C60 single crystal
Journal
Applied Physics Letters
Journal Volume
2
Journal Issue
1
Pages
2665-2667
Date Issued
2012
Author(s)
Abstract
The temperature dependence of persistent photoconductivity (PPC) has been investigated in high-quality C60 single crystals. We found that the rotational order and disorder phase transition (Tc≊260 K) can significantly change the PPC behavior. At temperatures above Tc, the PPC relaxation rate increases as temperature increases. Quite surprisingly, in the region T<Tc, the PPC relaxation rate decreases with increasing temperature. Our result clearly indicates that the underlying mechanism of the PPC effect involves the motion of the C60 molecule.
Type
journal article