Charge localization in organic conductors (TM)X: The influence of anion ordering |
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| Authors: | P. Auban-Senzier C. Lenoir P. Batail D. Jérome S. Tomić |
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| Affiliation: | (1) Laboratoire de Physique des Solides (associé au CNRS), Université Paris-Sud, 91405 Orsay, France, FR;(2) Institute of Physics, HR-10000 Zagreb, Croatia, HR |
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| Abstract: | An investigation of the different contributions leading to charge localization in a 1/2 or 1/4 filled band 1D conductor has been conducted through a study of transport properties in the solid solution [(TMTSF)1-x (TMTTF) x]2ReO4. The existence of an ordering transition of the anions allows to identify two contributions to the electronic potential with wave vector 4kF. A dominant on-site 4kF potential besides the bond contribution is revealed when Umklapp scattering is pertinent via the weakening of the localization arising at the (0, 1/2, 1/2) anion ordering which is stabilized under pressure in the compound [(TMTSF) 0.5 (TMTTF)0.5]2ReO4 at variance with the enhancement of localization observed in the homomolecular (TMTTF)2ReO 4 material. Received: 13 May 1998 / Revised: 8 July 1998 / Accepted: 9 July 1998 |
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| Keywords: | PACS. 71.10.Pm Fermions in reduced dimensions (anyons composite fermions Luttinger liquid etc.) - 74.70.Kn Organic superconductors |
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