Metal-insulator transition in highly conducting oriented polymers
نویسندگان
چکیده
منابع مشابه
Metal-insulator transition in highly conducting oriented polymers
We suggest that highly conducting oriented polymers with a fibril structure can be modeled by a regular lattice of disordered metallic wires with a random first-neighbor interwire coupling which mimics the cross-links between fibrils. We show that such a model can be described by a non-linear sigma model. Within a one-loop self-consistent approximation, we determine the position of the metal-in...
متن کاملMacroscopic disorder and the metal–insulator transition in conducting polymers
We describe a simple model for treating the frequency-dependent conductivity σe(ω) and dielectric function Re e(ω) of a quasi-one-dimensional conducting polymer. The polymer is modelled as a composite medium consisting of spherical regions of ordered polymer, randomly distributed in a much more disordered polymer host. Within each spherical region, the polymer chains are highly oriented, but th...
متن کاملInsulator to semimetallic transition in conducting polymers
W. A. Muñoz,1,* Sandeep Kumar Singh,1 J. F. Franco-Gonzalez,1 M. Linares,2,3 X. Crispin,1 and I. V. Zozoulenko1,† 1Laboratory of Organic Electronics, ITN, Linköping University, 601 74 Norrköping, Sweden 2Department of Physics, Chemistry and Biology, IFM, Linköping University, 581 83 Linköping, Sweden 3Swedish e-Science Research Centre (SeRC), Linköping University, 581 83 Linköping, Sweden (Rece...
متن کاملMetal-insulator transition in C60 polymers.
Variations in the band structures of C60-polymers are studied, when π-conjugation conditions are changed. We look at band structures in order to discuss a metal-insulator transition, using a semi-empirical model with the Su-SchriefferHeeger type electron-phonon interactions. We find that electronic structures change among direct-gap insulators and the metal, depending on the degree of π-conjuga...
متن کاملInsulator-metal transition in highly compressed NiO.
The insulator-metal transition was observed experimentally in nickel monoxide (NiO) at very high pressures of ~240 GPa. The sample resistance becomes measurable at about 130 GPa and decreases substantially with the pressure increase to ~240 GPa. A sharp drop in resistance by about 3 orders of magnitude has been observed at ~240 GPa with a concomitant change of the resistance type from semicondu...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review B
سال: 1997
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.56.3086