Abstract
Far-infrared reflectivity spectra have been investigated for a charge-transfer complex of tetrathiafulvalene and 2-bromo-3,5,6-trichloro-p-benzoquinone, which undergoes a neutral-ionic (N-I) transition at Tc = 68 K. With decrease in temperature toward Tc, the far-infrared reflectivity spectrum is gradually transformed into a Drude-like high reflectance band edging around 100 cm-1, and the optical conductivity shows an anomalous peak around 10 cm-1. The far-infrared anomaly is related to the gigantic dielectric response just above Tc, which are both discussed in terms of dynamics of N-I domain walls with fractional charge.
Original language | English |
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Pages (from-to) | 637-639 |
Number of pages | 3 |
Journal | Synthetic Metals |
Volume | 133-134 |
DOIs | |
Publication status | Published - 2003 Mar 13 |
Event | ISCOM 2001 - Rusutsu, Hokkaido, Japan Duration: 2001 Sep 10 → 2001 Sep 14 |
Keywords
- Neutral-ionic domain wall
- Neutral-ionic transition
- Optical conductivity
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry