Evidence for Disorder Induced Delocalization in Graphite

Casparis, L. and Hug, D. and Kölbl, D. and Zumbühl, D. M.. (2013) Evidence for Disorder Induced Delocalization in Graphite. arxiv.org [cond-mat.mes-hall].

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Official URL: http://edoc.unibas.ch/42816/

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We present electrical transport measurements in natural graphite and highly ordered pyrolytic graphite (HOPG), comparing macroscopic samples with exfoliated, nanofabricated specimen of nanometer thickness. Nano-samples exhibit a very large c-axis resistivity \rho_c - much larger than expected from simple band theory - and non-monotonic temperature dependence, similar to macroscopic HOPG, but in stark contrast to macroscopic natural graphite. A recent model of disorder induced delocalization is consistent with the data. Micro-Raman spectroscopy reveals clearly reduced disorder in exfoliated samples and HOPG, as expected within the model - therefore presenting further evidence for a novel paradigm of electronic transport in graphite.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Experimentalphysik Quantenphysik (Zumbühl)
UniBasel Contributors:Zumbühl, Dominik M
Item Type:Article
Article Subtype:Research Article
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:30 Jun 2016 11:04
Deposited On:23 May 2016 08:45

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