Conducting polymers near metal-insulator transition: Scaling and criticality

Mohan, A and Menon, R (2023) Conducting polymers near metal-insulator transition: Scaling and criticality. In: Physica B: Condensed Matter, 655 .

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Abstract

Scaling analysis provides insights into the critical region of metal-insulator transition (MIT). An analysis of conductivity near MIT is carried out in five conducting polymers by using a single scaling function, showing the universal behavior near critical regime. The conductivity of metallic samples merge to upper branch and that of insulating samples merge to lower branch of the scaling equation fits; with the fit parameters: conductivity exponent μ ≈ 1, correlation length exponent ν ≈ 1 and dynamic exponent z ≈ 2.5 in all five samples. Although conducting polymers are complex materials, the consistent values of critical exponents in quite different systems show the interesting feature of universality near MIT

Item Type:	Journal Article
Publication:	Physica B: Condensed Matter
Publisher:	Elsevier B.V.
Additional Information:	The copyright for this article belongs to Elsevier B.V.
Keywords:	Conducting polymers; Criticality (nuclear fission); Metal insulator boundaries; Organic conductors; Semiconductor insulator boundaries, Critical regimes; Critical region; Criticality; Localisation; Metal-insulators transitions; Metallic samples; Scaling analysis; Scaling functions; Scalings; Universal behaviors, Metal insulator transition
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	15 Mar 2023 09:53
Last Modified:	15 Mar 2023 09:53
URI:	https://eprints.iisc.ac.in/id/eprint/80967

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