Abstract
In the organic conductor (DMTSA)BF 4 [DMTSA: 2,3-dimethyl-tetra-seleno-antracene], the electronic system is expected to be the Mott-Hubbard insulator. However, its conductivity at room temperature is 200-400Ω -1 cm -1 and behaves metallic above ∼200K. At ambient pressure we found anomalies both in the DC conductivity components and in the permittivity at ∼80K, similar to those in (TMTTF) 2 X associated with charge ordering at ∼100K. Possible origin of the anomalies is discussed.
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