Erratum: Quadrupole Order in the Frustrated Pyrochlore ${\mathrm{Tb}}_{2+x}{\mathrm{Ti}}_{2-x}{\mathrm{O}}_{7+y}$ [Phys. Rev. Lett. 116, 217201 (2016)]

H. Takatsu, S. Onoda, S. Kittaka, A. Kasahara, Y. Kono, T. Sakakibara, Y. Kato, B. Fåk, J. Ollivier, J. W. Lynn, T. Taniguchi, M. Wakita, and H. Kadowaki

Phys. Rev. Lett. 127, 069902 – Published 6 August 2021