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arXiv · 1908.10857

A Cantilever Torque Magnetometry Method for the Measurement of Hall Conductivity of Highly Resistive Samples

Samuel Mumford·Tiffany Paul·Seung Hwan Lee·Amir Yacoby·Aharon Kapitulnik
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Abstract

We present the first measurements of Hall conductivity utilizing a new torque magnetometry method designed for insulators. A Corbino disk exhibits a magnetic dipole moment proportional to Hall conductivity when voltage is applied across a test material. This magnetic dipole moment can be measured through torque magnetometry. The symmetry of this contactless technique allows for the measurement of Hall conductivity in previously inaccessible materials. Finally, a low-temperature noise bound, the lack of systematic errors on dummy devices, and a measurement of the Hall conductivity of sputtered indium tin oxide demonstrate the efficacy of the technique.

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Samuel Mumford, Tiffany Paul, Seung Hwan Lee, Amir Yacoby, Aharon Kapitulnik. 2019-08-28. A Cantilever Torque Magnetometry Method for the Measurement of Hall Conductivity of Highly Resistive Samples. https://arxiv.org/abs/1908.10857

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