Experimental signatures of the mixed axial–gravitational anomaly in the Weyl semimetal NbP
J. Gooth, A. Niemann, T. Meng, A. Grushin, K. Landsteiner, B. Gotsmann, F. Menges, M. Schmidt, C. Shekhar, V. Süss, R. Hühne, B. Rellinghaus, C. Felser, Binghai Yan, K. Nielsch
Nature