Evidence for broken time-reversal symmetry in the superconducting phase of URu${}_2$Si${}_2$

E. R. Schemm, R. E. Baumbach, P. H. Tobash +3

Recent experimental and theoretical interest in the superconducting phase of the heavy fermion material URu${}_2$Si${}_2$ has led to a number of proposals in which the superconducting…