Tetrathiafulvalene Tetracyanoquinodimethane (TTF-TCNQ): A Zero-Bandgap Semiconductor?
- 3 February 1975
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 34 (5), 271-274
- https://doi.org/10.1103/physrevlett.34.271
Abstract
We present numerical calculations based on a tight-binding model for the organic conductor tetrathiafulvalene tetracyanoquinodimethane (TTF-TCNQ). The model consists of anisotropic planar TTF and TCNQ bands coupled together by an interplanar transfer integral, which produces a nearly zero-bandgap semiconductor. The calculations are compared with experiments and it is found unlikely that all of the data can be explained simultaneously by a noninteracting electron band structure. We then discuss how many-body effects may affect the model and lead to a metal-insulator transition as observed.Keywords
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