(Pressure,temperature) phase diagram of the quasi-1D 3/4 filled organic salt (o-DMTTF)2Br |
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| Authors: | P. Auban-Senzier,C.R. Pasquier,O. Jeannin,M. Fourmigué |
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| Affiliation: | 1. Laboratoire de Physique des Solides, UMR8502-CNRS, Université Paris-Sud, F-91405 Orsay,, France;2. Sciences Chimiques de Rennes, UMR6226-CNRS, Université de Rennes 1, Campus de Beaulieu, F-35042 Rennes, France |
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| Abstract: | The family of quasi-one-dimensional organic salts (o-DMTTF)2X, (X=Cl, Br, I) exhibits regular stacks and a high symmetry (tetragonal) structure which provides a perfect 3/4 band filling system with strong electronic correlations. We report transport measurements, resistivity and thermopower, performed as a function of pressure and/or temperature on (o-DMTTF)2Br which presents all the characteristics of the family. Coupled with data obtained from X-rays diffraction and magnetic susceptibility experiments at ambient pressure, in order to identify the insulating ground states, our data allowed to establish the (pressure, temperature) phase diagram for (o-DMTTF)2Br which differs significantly from those previously reported in other 3/4 filled systems. |
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| Keywords: | Charge ordering Dimer Mott Spin-Peierls Pressure |
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