Abstrakt
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 Na2Co2TeO6 (NCTO), a Kitaev QSL candidate, when the magnetic field is applied along the out-of-plane direction of the honeycomb plane. The thermal conductivity (Kxx) and thermal Hall conductivity (Kxy) in NCTO reveal distinct magnetic field dependences below and above the Neel temperature (TN) of 27 K.
For T > TN, Kxx has a monotonic decrease in the field dependence, while Kxy persists up to T ??? = 150 K. On the other hand, both Kxx and Kxy exhibit complex field dependence for