The far-infrared optical response of neutral-ionic (N-I) phase transition in an organic charge-transfer complex was analyzed. The infrared optical spectra was investigated for a charge-transfer complex of tetrathiafulvalene and 2-bromo-3,5,6-trichloro-p-benzoquinone undergoing N-I transition at 68 K. Results showed that the far-infrared reflectivity spectrum was transformed into a Drude-like reflectance band edging around 100 cm-1. The optical conductivity showed an anomalous peak around 10 cm-1. The far-infrared absorption and its temperature dependence were proved to be relevant to the gigantic dielectric response.
|Number of pages||4|
|Journal||Physical Review Letters|
|Publication status||Published - 2001 Oct 29|
ASJC Scopus subject areas
- Physics and Astronomy(all)