Near-field scanning microwave microscopy of electrical and magnetic properties of graphene and graphite

V.V. Talanov, C. Del Barga, L. Wickey, M. Ovezmyradov, E.A. Shaner, A.V. Gin, N.G. Kalugin
New Mexico Tech, US

Keywords: graphene, graphite, microwave, near-field, microscopy

Summary:

In this work, a near-field scanning microwave microscope with the probe formed by an electrically open end of a 4 GHz half-lambda parallel-strip transmission line resonator has been employed [3] for mapping of electrical properties of graphene and graphite. Also, we report on the first use of a near-field scanning superconducting quantum interference device (SQUID) RF microscope for imaging of magnetic properties of graphite and graphene at 200 MHz. The work has been done with support of NSF, and was performed, in part, at the Center for Integrated Nanotechnologies, a U.S. Department of Energy, Office of Basic Energy Sciences user facility. Sandia National Laboratories is a multi-program laboratory operated by Sandia Corporation, a Lockheed-Martin Company, for the U. S. Department of Energy under Contract No.DE-AC04-94AL85000.