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  Influence of interfaces on the transport properties of graphite revealed by nanometer thickness reduction

Zoraghi, M., Barzola-Quiquia, J., Stiller, M., Esquinazi, P. D., & Estrela-Lopis, I. (2018). Influence of interfaces on the transport properties of graphite revealed by nanometer thickness reduction. Carbon, 139, 1074-1084. doi:10.1016/j.carbon.2018.07.070.

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Genre: Journal Article

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 Creators:
Zoraghi, Mahsa1, 2, Author              
Barzola-Quiquia, José1, Author
Stiller, Markus1, Author
Esquinazi, Pablo D.1, Author
Estrela-Lopis, Irina3, Author
Affiliations:
1Division of Superconductivity and Magnetism, Felix Bloch Institute for Solid State Physics, University of Leipzig, Germany, ou_persistent22              
2Department Neurophysics (Weiskopf), MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_2205649              
3Department of Medical Physics and Biophysics, University of Leipzig, Germany, ou_persistent22              

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 Abstract: We investigated the influence of thickness reduction on the transport properties of graphite microflakes. Using oxygen plasma etching we decreased the thickness of highly oriented pyrolytic graphite (HOPG) microflakes from nm to nm systematically. Keeping current and voltage electrodes intact, the electrical resistance , the magnetoresistance (MR) and Raman spectra were measured in every individual sample and after each etching step of a few nm. The results show that and MR can increase or decrease with the sample thickness in a non-systematic way. The results indicate that HOPG samples are inhomogeneous materials, in agreement with scanning transmission electron microscopy images and X-ray diffraction data. Our results further indicate that the quantum oscillations in the MR are not an intrinsic property of the ideal graphite structure but their origin is related to internal conducting interfaces.

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Language(s): eng - English
 Dates: 2018-07-232018-03-192018-07-302018-08-032018-11
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/j.carbon.2018.07.070
 Degree: -

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Project name : Functionality of oxidic Interfaces / SFB 762
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Funding organization : Deutsche Forschungsgemeinschaft (DFG)
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Funding program : Milstein Fellowship
Funding organization : Mincyt of Argentine
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Funding organization : Instituto Balseiro
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Funding organization : University of Buenos Aires
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Funding organization : University of San Miguel de Tucuman

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Title: Carbon
  Abbreviation : Carbon
Source Genre: Journal
 Creator(s):
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Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 139 Sequence Number: - Start / End Page: 1074 - 1084 Identifier: ISSN: 0008-6223
CoNE: https://pure.mpg.de/cone/journals/resource/954925388220