Thermal Hall effects in quantum magnets

XT Zhang, YH Gao, G Chen - Physics Reports, 2024 - Elsevier
In the recent years, the thermal Hall transport has risen as an important diagnosis of the
physical properties of the elementary excitations in various quantum materials, especially …

Chiral phonons in quartz probed by X-rays

H Ueda, M García-Fernández, S Agrestini, CP Romao… - Nature, 2023 - nature.com
The concept of chirality is of great relevance in nature, from chiral molecules such as sugar
to parity transformations in particle physics. In condensed matter physics, recent studies …

Evidence of a Phonon Hall Effect in the Kitaev Spin Liquid Candidate

É Lefrançois, G Grissonnanche, J Baglo… - Physical Review X, 2022 - APS
The material α-RuCl 3 has been the subject of intense scrutiny as a potential Kitaev
quantum spin liquid, predicted to display Majorana fermions as low-energy excitations. In …

Giant, magnet-free, and room-temperature Hall-like heat transfer

L Xu, J Liu, G Xu, J Huang… - Proceedings of the …, 2023 - National Acad Sciences
Thermal chirality, generically referring to the handedness of heat flux, provides a significant
possibility for modern heat control. It may be realized with the thermal Hall effect yet at the …

The phonon thermal Hall angle in black phosphorus

X Li, Y Machida, A Subedi, Z Zhu, L Li… - Nature …, 2023 - nature.com
The origin of phonon thermal Hall Effect (THE) observed in a variety of insulators is yet to be
identified. Here, we report on the observation of a thermal Hall conductivity in a non …

Phonon chirality from impurity scattering in the antiferromagnetic phase of Sr2IrO4

A Ataei, G Grissonnanche, ME Boulanger, L Chen… - Nature Physics, 2024 - nature.com
A thermal Hall effect occurs in an increasing number of insulators and is often attributed to
phonons, but the underlying mechanism is not known in most cases. Two main scenarios …

Resonant thermal Hall effect of phonons coupled to dynamical defects

H Guo, DG Joshi, S Sachdev - Proceedings of the National …, 2022 - National Acad Sciences
We present computations of the thermal Hall coefficient of phonons scattering off a defect
with multiple energy levels. Using a microscopic formulation based on the Kubo formula, we …

Phonon thermal Hall effect in a metallic spin ice

T Uehara, T Ohtsuki, M Udagawa, S Nakatsuji… - Nature …, 2022 - nature.com
It has become common knowledge that phonons can generate thermal Hall effect in a wide
variety of materials, although the underlying mechanism is still controversial. We study …

Phonon thermal hall conductivity from scattering with collective fluctuations

L Mangeolle, L Balents, L Savary - Physical Review X, 2022 - APS
Because electrons and ions form a coupled system, it is a priori clear that the dynamics of
the lattice should reflect symmetry breaking within the electronic degrees of freedom …

Chiral phonons induced from spin dynamics via magnetoelastic anisotropy

B Ma, ZD Wang, G Chen - Physical Review Letters, 2024 - APS
We propose a mechanism to obtain chiral phononlike excitations from the bond-dependent
magnetoelastic couplings in the absence of out-of-plane magnetization and magnetic fields …