Open AccessGiant Peltier conductivity in an uncompensated semimetal Ta2PdSe6
Author(s) -
Akitoshi Nakano,
Ai Yamakage,
Urara Maruoka,
Hiroki Taniguchi,
Yukihiko Yasui,
Ichiro Terasaki
Publication year - 2021
Publication title -
jphys energy
Language(s) - English
Resource type - Journals
ISSN - 2515-7655
DOI - 10.1088/2515-7655/ac2357
Subject(s) - semimetal , thermoelectric effect , condensed matter physics , thermoelectric materials , materials science , electrical resistivity and conductivity , conductivity , semiconductor , effective mass (spring–mass system) , superconductivity , physics , optoelectronics , thermodynamics , quantum mechanics , band gap
Thermoelectric properties of single crystal Ta 2 PdSe 6 is investigated by means of transport measurements, and a density functional calculation. We found a giant Peltier conductivity of 100 A cm −1 K −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.