Measuring Hall Conductivity Using a Cantilever Torque Magnetometer

ORAL

Abstract

We present Hall conductivity measurements of Corbino-disk patterned thin film samples on a cantilever-based torque magnetometer. When a voltage is applied across the sample and a magnetic field is applied through the sample plane, the Hall current provides a magnetic moment that interacts with the external magnetic field and yields a torque on the end of the cantilever. The symmetry of this technique eliminates contributions from longitudinal resistance, making Hall conductivity measurements of previously inaccessible materials possible. Following a demonstration of how we determine the elastic properties of the cantilever system, we discuss various realizations of the technique, including for transverse thermoelectric currents, and show preliminary results on simple electronic systems.

*This work was funded by the Army Research Office grant W911NF1710588, and by the Gordon and Betty Moore Foundation through Emergent Phenomena in Quantum Systems (EPiQS) Initiative Grant GBMF4529

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Presenters

  • Tiffany Paul

    • Stanford University
    • Department of Applied Physics, Stanford University
    • Department of Physics, University of Florida

Authors

  • Tiffany Paul

    • Stanford University
    • Department of Applied Physics, Stanford University
    • Department of Physics, University of Florida

  • Samuel Mumford

    • Stanford University

  • Amir Yacoby

    • Harvard University
    • Harvard Univ
    • Physics, Harvard University
    • Department of Physics, Harvard University & School of Engineering and Applied Sciences, Harvard University

  • Aharon Kapitulnik

    • Stanford University
    • Physics, Stanford University