Abstract
Kitaev physics has recently attracted attention in condensed matter for its anticipated quantum spin liquid (QSL) state. The thermal transport measurement is crucial for probing the features of charge-neutral quasiparticles. In this letter, we report a significant thermal Hall effect in (NCTO), a Kitaev QSL candidate, when the magnetic field is applied along the out-of-plane direction of the honeycomb plane. The thermal conductivity () and thermal Hall conductivity () in NCTO reveal distinct magnetic field dependences below and above the Neel temperature of 27 K. For has a monotonic decrease in the field dependence, while persists up to . On the other hand, both and exhibit complex field dependence for .
- Received 24 November 2021
- Revised 26 June 2022
- Accepted 2 August 2022
DOI:https://doi.org/10.1103/PhysRevB.106.L081116
©2022 American Physical Society