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Probing variable range hopping lengths by magneto conductance in carbonized polymer nanofibers
Chalmers University of Technology, Sweden.ORCID-id: 0000-0003-1962-5572
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2018 (engelsk)Inngår i: Scientific Reports, E-ISSN 2045-2322, Vol. 8, nr 1Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Using magneto transport, we probe hopping length scales in the variable range hopping conduction of carbonized polyacetylene and polyaniline nanofibers. In contrast to pristine polyacetylene nanofibers that show vanishing magneto conductance at large electric fields, carbonized polymer nanofibers display a negative magneto conductance that decreases in magnitude but remains finite with respect to the electric field. We show that this behavior of magneto conductance is an indicator of the electric field and temperature dependence of hopping length in the gradual transition from the thermally activated to the activation-less electric field driven variable range hopping transport. This reveals magneto transport as a useful tool to probe hopping lengths in the non-linear hopping regime. 

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Nature Publishing Group , 2018. Vol. 8, nr 1
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URN: urn:nbn:se:ri:diva-68178DOI: 10.1038/s41598-018-23254-0Scopus ID: 2-s2.0-85044284799OAI: oai:DiVA.org:ri-68178DiVA, id: diva2:1817262
Tilgjengelig fra: 2023-12-05 Laget: 2023-12-05 Sist oppdatert: 2023-12-05bibliografisk kontrollert

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