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Determination of Diffusion Length of Carriers in Graphene Using Contactless Photoelectromagnetic Method of Investigations

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Abstract

The photoelectromagnetic (PEM) investigations are proposed for determination of diffusion length of carriers in graphene. The presented measurements are performed in Corbino configuration using noncontact technique. The circular PEM currents are detected in an outer coil by induction if illumination intensity is periodically varied. The theoretical dependence of PEM response on magnetic field induction, intensity and spatial distribution of illumination as well as on frequency of illumination chopping is presented. Experimental PEM data are presented for graphene films grown by CVD processing on a cooper foil and transferred onto a glass substrate. The presented method of investigations should be essential for development of graphene electronic and optoelectronic devices.

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Acknowledgments

This work was supported by the National Science Centre (Poland) project no. DEC-2012/05/B/ST7/01198.

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Authors and Affiliations

  1. Institute of Physics - Center for Science and Education, Silesian University of Technology, Krasińskiego 8, 40-019, Katowice, Poland

    Marian Nowak, Barbara Solecka & Marcin Jesionek

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  1. Marian Nowak
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  2. Barbara Solecka
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  3. Marcin Jesionek
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Nowak, M., Solecka, B. & Jesionek, M. Determination of Diffusion Length of Carriers in Graphene Using Contactless Photoelectromagnetic Method of Investigations. MRS Online Proceedings Library 1727, 31–36 (2014). https://doi.org/10.1557/opl.2015.68

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  • DOI: https://doi.org/10.1557/opl.2015.68

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