Abstract
The insulator-metal transition (IMT) for a model quasi-one-dimensional (quasi-1D) conducting polymer (polyaniline) is probed at room temperature (RT) over an unusually broad frequency range (2 meV-6 eV) and also via T-dependent dc conductivity (σdc). We determine that the IMT is not monotonic with increasing σdc(RT). The RT far infrared scattering time (τ) becomes unusually long (≥ 10−13s) as σdc(RT) increases, even for samples on the insulating side of the IMT. We conclude that the IMT is due to percolation in the presence of inhomogeneous disorder and quasi-1D localization rather than 3D Anderson localization.
Original language | English |
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Pages (from-to) | 2766-2769 |
Number of pages | 4 |
Journal | Physical review letters |
Volume | 77 |
Issue number | 13 |
DOIs | |
Publication status | Published - 1996 |
ASJC Scopus subject areas
- General Physics and Astronomy