Broken rotational symmetry on the Fermi surface of a high-Tc superconductor
B.J. Ramshaw, N. Harrison, S.E. Sebastian, S. Ghannadzadeh, K.A. Modic, D.A. Bonn, W.N. Hardy, R. Liang, P.A. Goddard, Npj Quantum Materials 2 (2017).