Charge condensation and lattice coupling drives stripe formation in nickelates by Shen, Y, Fabbris, G, Miao, H, Cao, Y, Meyers, D, Mazzone, DG, Assefa, TA, Chen, XM, Kisslinger, K, Prabhakaran, D, Boothroyd, AT, Tranquada, JM, Hu, W, Barbour, AM, Wilkins, SB, Mazzoli, C, Robinson, IK, Dean, MPM