arXiv:1501.01767 · Nature Physics
Fractional excitations in the square-lattice quantum antiferromagnet
B. Dalla Piazza, Martin Mourigal, Niels Bech Christensen, Gøran Jan Nilsen, Philip L. W. Tregenna‐Piggott, T. G. Perring, M. Enderle, MCMORROW Desmond Francis, Dmitri A. Ivanov, Henrik Moodysson Rønnow