Researchers have created and photographed synthetic magnetic monopoles under lab conditions. The development lays the foundation for the underlying structure of the natural magnetic monopole – the detection of which would be a revolutionary event comparable to the discovery of the electron.
Physicists create synthetic magnetic monopoles in the lab -- ScienceDaily
Journal References:
Ville Pietilä, Mikko Möttönen. Creation of Dirac Monopoles in Spinor Bose-Einstein Condensates. Physical Review Letters, 2009; 103 (3) DOI: 10.1103/PhysRevLett.103.030401
M. W. Ray, E. Ruokokoski, S. Kandel, M. Möttönen, D. S. Hall. Observation of Dirac monopoles in a synthetic magnetic field. Nature, 2014; 505 (7485): 657 DOI: 10.1038/nature12954