New Insights into the Reentry Behavior of Deuterated DCNQI Cu-Salts by Microwave Measurements |
| S. Predak, H.W. Helberg Third Physical Institute, University of Göttingen, Germany and J.U. Von Schütz 3. Physical Institute, University of Stuttgart, Germany |
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| The microwave conductivity of the copper salt of DCNQI (N,N'-Dicyanoquinodiimine) with two methyl side groups (undeuterated, h8), the fully deuterated salt (d8), the salt with only the methyl groups deuterated and of alloys of undeuterated and deuterated salts was measured. The microwave conductivity (10.2 GHz) qualitatively follows the dc conductivity. The difference is in the window of diminished conductivity between phase transition and reentry, where the microwave conductivity is higher than the dc conductivity. This indicates the existence of a crystal fraction with higher (metallic) conductivity (portion: ≈ 1‰) not seen by dc methods. |
| DOI: 10.12693/APhysPolA.87.791 PACS numbers: 72.80.Le, 72.60.+g, 78.70.Gq |