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Related Experiment Video

Updated: Feb 8, 2026

Demonstrating the Simplicity and In Situ Temperature Monitoring of the Mechanochemical Synthesis of Metal Chalcogenides Suitable for Thermoelectrics

Demonstrating the Simplicity and In Situ Temperature Monitoring of the Mechanochemical Synthesis of Metal Chalcogenides Suitable for Thermoelectrics

Published on: August 30, 2024

Semi-metals as potential thermoelectric materials.

Maxime Markov¹, Xixiao Hu², Han-Chun Liu¹

¹Department of Electrical and Computer Engineering, University of Virginia, Charlottesville, Virginia, 22904, USA.

Scientific Reports

|July 1, 2018

Summary

This study explores semimetals as thermoelectric materials, challenging the semiconductor assumption. Intrinsic HgTe demonstrates a high thermoelectric power factor, comparable to leading materials, suggesting new avenues for thermoelectric applications.

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Last Updated: Feb 8, 2026

Demonstrating the Simplicity and In Situ Temperature Monitoring of the Mechanochemical Synthesis of Metal Chalcogenides Suitable for Thermoelectrics

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Characterization of Full Set Material Constants and Their Temperature Dependence for Piezoelectric Materials Using Resonant Ultrasound Spectroscopy

Characterization of Full Set Material Constants and Their Temperature Dependence for Piezoelectric Materials Using Resonant Ultrasound Spectroscopy

Published on: April 27, 2016

Area of Science:

Materials Science
Condensed Matter Physics
Solid-State Chemistry

Background:

Thermoelectric materials are crucial for energy conversion, typically relying on heavily doped semiconductors.
A band gap has been considered essential for achieving high thermoelectric performance.
Alternative material classes are needed to advance thermoelectric device efficiency.

Purpose of the Study:

To investigate semimetals with asymmetric band structures as potential thermoelectric materials.
To explore the thermoelectric properties of mercury telluride (HgTe) both theoretically and experimentally.
To evaluate the feasibility of using semimetals for efficient thermoelectric energy conversion.

Main Methods:

Utilizing ab initio calculations with hybrid exchange-correlation functionals to model electronic band structure.
Applying Boltzmann Transport theory to analyze electronic transport properties.
Performing first-principles calculations for lattice thermal conductivity and experimental characterization of HgTe samples.

Main Results:

Theoretical predictions for HgTe's electronic band structure and transport properties align well with experimental data.
Intrinsic HgTe exhibits a significant thermoelectric power factor, rivaling established thermoelectric materials.
The large asymmetry in electron and hole masses in HgTe contributes to its high performance.

Conclusions:

Semimetals with asymmetric conduction and valence bands represent a promising alternative class for thermoelectric applications.
HgTe serves as a model system demonstrating the high potential of such semimetallic materials.
Further research into similar semimetallic compounds could yield next-generation thermoelectric materials.