Abstract
Temperature dependence of resistance is studied for polyimide (PI) samples implanted by Co+ ions with fluences of 2.5x10e16-1.25x10e17 cm-2 at ion current densities of 4, 8 and 12 microA.cm-2. It is found that electron transport in the implanted samples originates from radiation-induced changes of the PI and Co nanoparticle formation and it depends dramatically on the ion current density. A variable range hopping mechanism dominates for all fluences at a low ion current density of 4 microA.cm-2 while a transition to a semimetallic type of conductance is observed with an increase in ion current density due to agglomeration of the Co nanoparticles forming a percolation way for the charge carriers. It is shown that both quantum effects of weak localisation and electron-electron interaction give a significant contribution to the transport mechanism.
| Originalsprog | Russisk |
|---|---|
| Tidsskrift | Doklady of National Academy of Sciences of Belarus |
| Vol/bind | 48 |
| Udgave nummer | 4 |
| Sider (fra-til) | 42-47 |
| Antal sider | 6 |
| Status | Udgivet - aug. 2004 |
| Udgivet eksternt | Ja |