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  • The low-frequency dielectric response and non-linear DC electrical transport in ▫$\kappa$▫-(BEDT-TTF▫$)_2$▫Cu[N(CN▫$)_2$▫]Cl
    Pinterić, Marko ...
    We report AC transport and non-linear DC electrical transport in single crystals of the organic conductor ▫$\kappa$▫(BEDT-TTF▫$)_2$▫Cu[N(CN▫$)_2$▫]Cl. Non-linear conductivity emerges below 22K, which ... is the temperature of canted antiferromagnetic ordering. A broad dielectric relaxion mode of moderate strength (▫$\Delta\epsilon\approx 3\times 10^3$▫) appears at 32K, and weakens with temperature. The mean relaxation time, much larger than that expected for single-particle excitations, is thermally activated in a manner similar to the DC conductivity and saturates below 22K. The observed dielectric response data give evidence of a collective mode contributtion to the dielectric properties, which might be attributed to charged domain walls in a feromagnetic domain structure. Non-linear conductivity similar to those observed for commensurate spin and charge density waves are found.
    Source: Proceedings (Str. 83-88)
    Type of material - conference contribution
    Publish date - 1999
    Language - english
    COBISS.SI-ID - 4836374