Levenson-Falk, E M Polar Kerr Effect from Time-Reversal Symmetry Breaking in the Heavy-Fermion Superconductor PrOs_Sb_. [electronic resource] - Physical review letters May 2018 - 187004 p. digital Publication Type: Journal Article ISSN: 1079-7114 Standard No.: 10.1103/PhysRevLett.120.187004 doi