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Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating

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Energy Transport in Superionic Crystals.

Wenxiang Liu¹, Yanguang Zhou¹

¹The Hong Kong University of Science and Technology, Department of Mechanical and Aerospace Engineering, Clear Water Bay, Kowloon, Hong Kong SAR.

Physical Review Letters

|April 25, 2025

Summary

This summary is machine-generated.

Superionic crystals transfer heat via atomic vibrations and ion diffusion. Their complex thermal conductivity, influenced by these pathways, explains varied temperature dependencies observed experimentally.

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Area of Science:

Condensed Matter Physics
Materials Science
Thermodynamics

Background:

Superionic crystals exhibit complex thermal transport properties.
Understanding thermal conductivity temperature dependence in these materials is crucial.

Purpose of the Study:

To propose a rigorous concept for describing thermal transport in superionic crystals.
To elucidate the mechanisms behind their diverse thermal conductivity behaviors.

Main Methods:

Application of the Onsager reciprocal theorem.
Analysis of thermal energy transfer through atomic vibrations, enthalpy diffusion, and thermodiffusion coupling.

Main Results:

Thermal conductivity from atomic vibrations decreases with increasing temperature.
Thermal conductivity from enthalpy diffusion increases with temperature due to enhanced ion mobility.
Thermal conductivity from thermodiffusion coupling is negligible.

Conclusions:

The apparent thermal conductivity is governed by the interplay between vibration conduction and enthalpy diffusion.
This model explains the observed negative, weak, and positive temperature dependencies of thermal conductivity in superionic crystals.