Crystals of the organic semiconductor Cs2TCNQ3 have been grown under the influence of magnetic field of 5 T and their optical properties have been compared with the crystals grown without magnetic field. The magnetic field effect manifests itself as the enhancement of the intradimer charge transfer band S1, which appears at around 1.3 eV in the E//a polarization. The high-pressure optical absorption measurements have shown that the S1 band of the crystal grown at 5T contains a new component, which is significantly intensified with increasing pressure up to 1 GPa, but diminishes as pressure increases further up to 4 GPa, and remains constant at higher pressures. This new component is additional to the component of S1 band which has similar properties to that of the crystals grown without magnetic filed, which continuously grows up to 3 GPa and abruptly broadens out at higher pressures. The new component of S1 is strongly linked to the ferromagnetism in this substance.
ASJC Scopus subject areas
- Condensed Matter Physics