Metallic Contact Contributions in Thermal Hall Conductivity Measurements

2025/08/15 by Ma, Hongyu, Hu, Xuesong, Shi, Junren · 1 citation
#FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci)

paper · doi:10.48550/arxiv.2508.11240

Abstract

We investigate the influence of metallic contacts on thermal Hall measurements. By analyzing typical measurement setups, we show that heat currents bypassing through metallic contacts could generate non-negligible thermal Hall signals. We find that contributions from metallic contacts with thicknesses on the order of 10^-2 of sample widths can approximately replicate experimental observations across different materials in both temperature dependence and magnitude, assuming silver contacts with a conductivity of 10⁸~S/m. Our analysis underscores the need to minimize metallic contact effects in thermal Hall measurements, which can be achieved by optimizing measurement configurations.

Citations

• Large Thermal Hall Effect in MnPS₃
• Intrinsic thermal Hall effect of optical phonons enhanced by discrete rotational symmetry
• Discovery of universal phonon thermal Hall effect in crystals
• Magnon-Polaron Driven Thermal Hall Effect in a Heisenberg-Kitaev Antiferromagnet

Cited by

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