The resistance of quasi-one-dimensional single crystals Rb2Mo6Se6, Rb2Mo6Te6 and Cs2Mo6Te6 has been measured up to 17 kbar down to 1.2 K. The broad metal-semiconductor transition amd the associated activation energy are suppressed monotonically by pressure. The resistivity at room temperature is suppressed only slightly by pressure, but it decreases rapidly with pressure at low temperature where the resistivity in both Rb2Mo6Te6 and Cs2Mo6Te6 exhibits a drastic reduction in the activation energy. The results suggest that the broad metal-semiconductor transition is associated with a Peierls transition.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Materials Chemistry