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Research Paper

Applied Science and Convergence Technology 2023; 32(2): 41-44

Published online March 30, 2023


Copyright © The Korean Vacuum Society.

Prediction of Absolute Hall Effect Sensitivity and Minimum Magnetic Resolution for Two-Dimensional Rhenium Disulfide Multilayer Magnetic Sensors without Magnetic Fields

Min-Kyu Jooa , b , ∗

aDepartment of Applied Physics, Sookmyung Women’s University, Seoul 04310, Republic of Korea
bInstitute of Advanced Materials and Systems, Sookmyung Women’s University, Seoul 04310, Republic of Korea

Correspondence to:mkjoo@sookmyung.ac.kr

Received: February 20, 2023; Revised: March 15, 2023; Accepted: March 15, 2023

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License(http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.


Absolute Hall-effect sensitivity (SA) and minimum magnetic resolution (Bmin) of two-dimensional (2D) van der Waals Hall elements are predicted without magnetic fields by considering the drain voltage-dependent transconductance and current power spectrum density (PSD). The measured drain-bias-dependent PSD of rhenium disulfide multilayers is suitably described by the carrier number fluctuation noise model, indicating that the effects of carrier trapping/de-trapping into oxide traps dominate the observed current variations. To achieve high currentnormalized Hall sensitivity and SA with a low Bmin at a specific current value, the contact resistance and oxide trap density should be further optimized. Our discussion provides an effective approach for the optimization of 2D multilayer-based Hall elements.

Keywords: Two-dimensional materials, Hall sensor, Magnetic resolution, Analytical model, Contact resistance, Carrier mobility

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