title: High resolution polar Kerr effect measurements of Sr2RuO4: evidence for broken time-reversal symmetry in the superconducting state.
abstract: The polar Kerr effect in the spin-triplet superconductor Sr2RuO4 was measured with high precision using a Sagnac interferometer with a zero-area Sagnac loop. We observed nonzero Kerr rotations as big as 65 nanorad appearing below Tc in large domains. Our results imply a broken time-reversal symmetry state in the superconducting state of Sr2RuO4, similar to 3He-A.
authors.affiliation: Department of Physics, Stanford University, Stanford, CA 94305, USA.
authors.forename: Jing
authors.initials: J
authors.lastname: Xia
authors.forename: Yoshiteru
authors.initials: Y
authors.lastname: Maeno
authors.forename: Peter T
authors.initials: PT
authors.lastname: Beyersdorf
authors.forename: M M
authors.initials: MM
authors.lastname: Fejer
authors.forename: Aharon
authors.initials: A
authors.lastname: Kapitulnik