Giant Peltier Conductivity in an Uncompensated Semimetal Ta2PdSe6

TL;DR

This paper reports a giant Peltier conductivity in the semimetal Ta2PdSe6, attributed to its high mobility and heavy effective mass, suggesting new thermoelectric applications.

Contribution

It demonstrates a giant Peltier effect in an uncompensated semimetal and explains it using conventional semiconductor theory, opening new avenues in thermoelectric research.

Findings

Giant Peltier conductivity of 100 Acm-1K-1 at 10 K

Attributed to high mobility and heavy effective mass

Potential for new thermoelectric applications

Abstract

Thermoelectric properties of single crystal Ta2PdSe6 is investigated by means of transport measurements, and a density functional calculation. We found a giant Peltier conductivity of 100 Acm-1K-1 at 10 K and successfully explained it by means of conventional semiconductor theory. We concluded that an uncompensated semimetal, high mobility, and heavy effective mass are responsible for the giant Peltier conductivity. Our finding opens a new ground in the field of thermoelectrics to explore much better semimetals for a new possible application such as an electric current generator for a superconducting magnet.