The original version of this Article contained an error in ref. 27, which was incorrectly given with the wrong journal name as:Meyer, S. et al. Observation of the spin Nernst effect. Nat. Phys. 16, 977-981 (2017).The correct form of ref. 27 is:Meyer, S. et al. Observation of the spin Nernst effect. Nat. Mater. 16, 977-981 (2017).This has now been corrected in the PDF and HTML versions of the Article.