Quantum Nernst effect in a bismuth single crystal
Mari Matsuo, Akira Endo, Naomichi Hatano, Hiroaki Nakamura, Ryoen, Shirasaki, Ko Sugihara
TL;DR
This paper provides a theoretical explanation for the quantum Nernst effect observed in bismuth single crystals, extending edge-current models to three dimensions and considering phonon-drag effects, aligning well with experimental data.
Contribution
It generalizes the edge-current picture to three dimensions and evaluates phonon-drag effects, explaining experimental observations of the quantum Nernst effect in bismuth.
Findings
Peaks of the Nernst coefficient persist in three dimensions.
Phonon-drag effect influences the Nernst coefficient.
Theoretical results match experimental observations.
Abstract
We report a theoretical calculation explaining the quantum Nernst effect observed experimentally in a bismuth single crystal. Generalizing the edge-current picture in two dimensions, we show that the peaks of the Nernst coefficient survive in three dimensions due to a van Hove singularity. We also evaluate the phonon-drag effect on the Nernst coefficient numerically. Our result agrees with the experimental result for a bismuth single crystal.
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Taxonomy
TopicsAdvanced Thermodynamics and Statistical Mechanics · Quantum and electron transport phenomena · Advanced Thermoelectric Materials and Devices