Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session N53: Magnetism in Correlated Electron Systems I: Materials & Neutrons
11:30 AM–2:18 PM,
Wednesday, March 16, 2022
Room: McCormick Place W-475B
Sponsoring
Units:
GMAG DCMP
Chair: Collin Broholm, John Hopkins University
Abstract: N53.00006 : Large Phonon Thermal Hall Effect in the Antiferromagnetic Insulator Cu3TeO6
12:30 PM–12:42 PM
Presenter:
Lu Chen
(Université de Sherbrooke)
Authors:
Lu Chen
(Université de Sherbrooke)
Marie-Eve Boulanger
(Universite de Sherbrooke)
Zhi-Cheng Wang
(Boston College)
Fazel Tafti
(Boston College)
Louis Taillefer
(Universite de Sherbrooke)
To shed new light on this question, we have studied an entirely different class of materials, the antiferromagnetic insulator Cu3TeO6. In this simple cubic material, we find the largest thermal Hall conductivity κxy of any insulator so far. The fact that κxy is ~ 50 times larger than in the cuprate Sr2CuO2Cl2, for example, is strong evidence that the phonons are responsible for the Hall signal, since the phonon-dominated longitudinal thermal conductivity, κxx, is also ~ 50 times larger. So κxy seems to grow in proportion with the conductivity of phonons.
We discuss the implications of the finding that the ratio κxy / κxx is roughly the same in these two very different materials, as well as in other insulating materials.
[1] Ideue et al., Nature Materials 16, 797 (2017).
[2] Grissonnanche et al., Nature 571, 376 (2019).
[3] Grissonnanche et al., Nature Physics 16, 1108 (2020).
[4] Boulanger et al., Nature Communications 11, 5325 (2020).
[5] Ye, Savary & Balents, arXiv:2103.04223 (2021).
[6] Sun, Chen & Kivelson, arXiv:2109.12117 (2021).
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