photo (IMAGE) The University of Hong Kong Caption a. Schematic diagram of the conical excitations of Dirac spinons and the conical continuum spectrum formed by two spinons. b. Schematic diagram of the conical spin excitations in YCu3(OH)6Br2[Br0.33(OD)0.67]. c. Relationship between the half-width at half-maximum and energy. The solid line represents a linear fit. d. A magnified image of some co-aligned crystals, and the front view of co-aligned samples on two Cu plates. Credit The University of Hong Kong Usage Restrictions n/a License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.