  A magnon Nernst effect, an antiferromagnetic analogue of the magnon Hall
effect in ferromagnetic insulators, has been studied experimentally for a
layered antiferromagnetic insulator MnPS3 in contact with two Pt strips.
Thermoelectric voltage in the Pt strips grown on MnPS3 single crystals exhibits
non-monotonic temperature dependence at low temperatures, which cannot be
explained by electronic origins in Pt but can be ascribed to the inverse spin
Hall voltage induced by a magnon Nernst effect. Control of antiferromagnetic
domains in the MnPS3 crystal by magnetoelectric cooling is found to modulate
the low-temperature thermoelectric voltage in Pt, which corroborates the
emergence of the magnon Nernst effect in Pt|MnPS3 hybrid structures.
