Shot and Johnson Noise Measurement in Graphene Using Wide-Bandwidth Measurement Technique

ORAL

Abstract

We measure shot and Johnson noise in single and bilayer graphene devices as a function of carrier density. For this measurement, we have developed a technique for measuring high-frequency wide-bandwidth noise. We use a low-noise RF amplifier, high-frequency digitizer, and digital signal processing to measure noise in the range of several hundred MHz of a device whose resistance can vary several orders of magnitude. We precisely characterize the resistance-dependent gain and noise temperature of the entire circuit using Johnson noise from the device itself, in a temperature range of 3-300K. This technique presents a very flexible measurement of noise from devices, allowing device resistance fluctuations of several orders of magnitude, extreme nonlinear resistance behavior, and highly non-equilibrium conditions.

*NDSEG, FAME Center sponsored by SRC MARCO and DARPA

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Authors

  • Artem Talanov

    • John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA

  • Jesse Crossno

    • John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA

  • Hugo Bartolomei

    • Department of Physics, Harvard University, Cambridge, MA 02138, USA

  • Kemen Linsuain

    • Department of Physics, Harvard University, Cambridge, MA 02138, US

  • Takashi Taniguchi

    • National Institute for Materials Science, Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan

  • Kenji Watanabe

    • National Institute for Materials Science, Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan

  • Thomas Ohki

    • Raytheon BBN Technologies, Quantum Information Processing Group, Cambridge, MA 02138, USA

  • Kin Chung Fong

    • BBN Raytheon
    • Raytheon BBN Technologies, Quantum Information Processing Group, Cambridge, MA 02138, USA

  • P. Kim

    • Harvard University
    • Department of Physics, Harvard University
    • Department of Physics, Harvard University, Cambridge, MA 02138, US
    • Harvard University, department of Physics
    • Harvard University, Department of Physics
    • Department of Physics, Harvard University, Cambridge, MA, 02138
    • Department of Physics, Harvard University, Cambridge, MA 02138