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Evidence of the charge-density wave state in polypyrrole nanotubes
Abstract
Here, we present a detailed investigation of the low-frequency dielectric and conductivity properties of conducting polymer nanowires. Our results, obtained by connecting ~107 nanowires in parallel, show that these polypyrrole nanowires behave like conventional charge-density wave (CDW) materials, in their nonlinear and dynamic response, together with scaling of relaxation time and conductivity. The observed Arrhenius law for both these quantities gives a CDW gap of 3.5 meV in the regime of temperature (~40 K) in which the CDW state survives. We find good agreement with a theory of weakly pinned CDW, screened by thermally excited carriers across the CDW gap. The identification of polymer nanowires as CDW provides us a model system to investigate charge ordering owing to electrostatic interaction, relevant to a variety of systems from dusty plasma to molecular biology.
- Authors:
-
- Saha Institute of Nuclear Physics, Kolkata (India)
- Argonne National Lab. (ANL), Lemont, IL (United States)
- Publication Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1357214
- Alternate Identifier(s):
- OSTI ID: 1180806
- Grant/Contract Number:
- AC02-06CH11357
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Physical Review. B, Condensed Matter and Materials Physics
- Additional Journal Information:
- Journal Volume: 91; Journal Issue: 16; Journal ID: ISSN 1098-0121
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Sarma, Abhisakh, Sanyal, Milan K., and Littlewood, Peter B. Evidence of the charge-density wave state in polypyrrole nanotubes. United States: N. p., 2015.
Web. doi:10.1103/PhysRevB.91.165409.
Sarma, Abhisakh, Sanyal, Milan K., & Littlewood, Peter B. Evidence of the charge-density wave state in polypyrrole nanotubes. United States. https://doi.org/10.1103/PhysRevB.91.165409
Sarma, Abhisakh, Sanyal, Milan K., and Littlewood, Peter B. 2015.
"Evidence of the charge-density wave state in polypyrrole nanotubes". United States. https://doi.org/10.1103/PhysRevB.91.165409. https://www.osti.gov/servlets/purl/1357214.
@article{osti_1357214,
title = {Evidence of the charge-density wave state in polypyrrole nanotubes},
author = {Sarma, Abhisakh and Sanyal, Milan K. and Littlewood, Peter B.},
abstractNote = {Here, we present a detailed investigation of the low-frequency dielectric and conductivity properties of conducting polymer nanowires. Our results, obtained by connecting ~107 nanowires in parallel, show that these polypyrrole nanowires behave like conventional charge-density wave (CDW) materials, in their nonlinear and dynamic response, together with scaling of relaxation time and conductivity. The observed Arrhenius law for both these quantities gives a CDW gap of 3.5 meV in the regime of temperature (~40 K) in which the CDW state survives. We find good agreement with a theory of weakly pinned CDW, screened by thermally excited carriers across the CDW gap. The identification of polymer nanowires as CDW provides us a model system to investigate charge ordering owing to electrostatic interaction, relevant to a variety of systems from dusty plasma to molecular biology.},
doi = {10.1103/PhysRevB.91.165409},
url = {https://www.osti.gov/biblio/1357214},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
issn = {1098-0121},
number = 16,
volume = 91,
place = {United States},
year = {Mon Apr 13 00:00:00 EDT 2015},
month = {Mon Apr 13 00:00:00 EDT 2015}
}
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