Planar thermal Hall effect from phonons in cuprates
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2023
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866913551863513088 |
|---|---|
| author | Chen, Lu Roux, Léna Le Grissonnanche, Gaël Boulanger, Marie-Eve Thériault, Steven Liang, Ruixing Bonn, D. A. Hardy, W. N. Pyon, S. Takayama, T. Takagi, H. Xu, Kejun Shen, Zhi-Xun Taillefer, Louis |
| author_facet | Chen, Lu Roux, Léna Le Grissonnanche, Gaël Boulanger, Marie-Eve Thériault, Steven Liang, Ruixing Bonn, D. A. Hardy, W. N. Pyon, S. Takayama, T. Takagi, H. Xu, Kejun Shen, Zhi-Xun Taillefer, Louis |
| contents | A surprising "planar" thermal Hall effect, whereby the field is parallel to the current, has recently been observed in a few magnetic insulators, and this has been attributed to exotic excitations such as Majorana fermions or chiral magnons. Here we investigate the possibility of a planar thermal Hall effect in three different cuprate materials, in which the conventional thermal Hall conductivity $κ_{\rm {xy}}$ (with an out-of-plane field perpendicular to the current) is dominated by either electrons or phonons. Our measurements show that the planar $κ_{\rm {xy}}$ from electrons in cuprates is zero, as expected from the absence of a Lorentz force in the planar configuration. By contrast, we observe a sizable planar $κ_{\rm {xy}}$ in those samples where the thermal Hall response is due to phonons, even though it should in principle be forbidden by the high crystal symmetry. Our findings call for a careful re-examination of the mechanisms responsible for the phonon thermal Hall effect in insulators. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2310_07696 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Planar thermal Hall effect from phonons in cuprates Chen, Lu Roux, Léna Le Grissonnanche, Gaël Boulanger, Marie-Eve Thériault, Steven Liang, Ruixing Bonn, D. A. Hardy, W. N. Pyon, S. Takayama, T. Takagi, H. Xu, Kejun Shen, Zhi-Xun Taillefer, Louis Strongly Correlated Electrons Superconductivity A surprising "planar" thermal Hall effect, whereby the field is parallel to the current, has recently been observed in a few magnetic insulators, and this has been attributed to exotic excitations such as Majorana fermions or chiral magnons. Here we investigate the possibility of a planar thermal Hall effect in three different cuprate materials, in which the conventional thermal Hall conductivity $κ_{\rm {xy}}$ (with an out-of-plane field perpendicular to the current) is dominated by either electrons or phonons. Our measurements show that the planar $κ_{\rm {xy}}$ from electrons in cuprates is zero, as expected from the absence of a Lorentz force in the planar configuration. By contrast, we observe a sizable planar $κ_{\rm {xy}}$ in those samples where the thermal Hall response is due to phonons, even though it should in principle be forbidden by the high crystal symmetry. Our findings call for a careful re-examination of the mechanisms responsible for the phonon thermal Hall effect in insulators. |
| title | Planar thermal Hall effect from phonons in cuprates |
| topic | Strongly Correlated Electrons Superconductivity |
| url | https://arxiv.org/abs/2310.07696 |