We report on the Hall effect measurements of the quasi two-dimensional organic superconductor κ-(BEDT-TTF)2Cu(NCS)2. A sign reversal phenomenon of the Hall resistivity is found in the mixed state. The Hall conductivity changes monotonically with field and temperature in contrast to the peak structure observed in the Hall resistivity. In low fields, the Hall conductivity diverges to infinity as -1/(H - H *), where H * is characteristic field in which the resistivity becomes zero. The phase diagram is proposed from these results.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering