Electrical conductivity in polymeric sulphur nitride at high pressures
Résumé
The resistivity along the chain axis in polymeric sulphur nitride has been followed under pressure using a variety of hydrostatic and quasi hydrostatic techniques. The large increase in conductivity with pressure at room temperature previously reported up to 9 kbar is confirmed, and is seen to level off above 30 kbar at a conductivity ratio ~( p ) / u ( O ) -10.
The TZ dependence of the resistivity seen at atmospheric pressure, associated with electronelectron scattering has been followed with pressure. At moderate pressures this dependence is more complicated; there are two regimes with different T 2 coefficients which both saturate below room temperature, pointing to a semimetallic band structure with small pockets of electrons and holes present. The high-pressure limit of G ( ~) / u ( O ) is seen to correspond to the level of electron-phonon scattering that can be expected from the superconductivity data.
Domaines
| Origine | Accord explicite pour ce dépôt |
|---|---|
| Licence |