High Resolution Polar Kerr Effect Measurements of Sr2RuO4: Evidence for Broken Time Reversal Symmetry in the Superconducting State

Details High Resolution Polar Kerr Effect Measurements of Sr2RuO4: Evidence for Broken Time Reversal Symmetry in the Superconducting State High Resolution Polar Kerr Effect Measurements of Sr2RuO4: Evidence for Broken Time Reversal Symmetry in the Superconducting State

2006-07-20

arxiv.org/abs/cond-mat/0607539v1

Phys. Rev. Lett. 97, 167002 (2006)

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1103/PhysRevLett.97.167002

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 non-zero 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 He3-A.

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