ISSN:
1434-6036
Keywords:
PACS. 72.15.Nj Collective modes, (e.g., in one-dimensional conductors) - 71.45.Lr Charge-density-wave systems - 71.30.+h Metal-insulator transitions and other electronic transitions - 77.22.Gm Dielectric loss and relaxation
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract. We report a detailed characterization of an unique 3-fold commensurate insulating state in single crystals of the organic – inorganic d hybrid Cu(DMe-DCNQI)2 systems with deuterated and partially deuterated DCNQI ring, by means of low-frequency dielectric spectroscopy. A broad relaxation mode of strength centred at kHz is observed in the hysteresis temperature region in which the insulating phase coexists with metallic islands. At lower temperatures, outside the nucleation range, the relaxation narrows, approaching a Debye-like form for an overdamped response of a system with a single degree of freedom. Both, the relaxation strength and the mean relaxation time ( ) are much larger than that expected for single-particle excitations. These features suggest the origin of the dielectric relaxation as an intrinsic property of the N = 3 charge density wave state.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s100510070207
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