Soft chemical control of superconductivity in lithium iron selenide hydroxides Li1–xFex(OH)Fe1–ySe by Sun, H, Woodruff, D, Cassidy, S, Allcroft, G, Sedlmaier, S, Thompson, A, Bingham, P, Forder, S, Cartenet, S, Mary, N, Ramos, S, Foronda, F, Williams, B, Li, X, Blundell, S, Clarke, S