Observation of Induced Chern-Simons Term in P- and T- violating Superconductors

Abstract

We show in this letter that P- and T-odd terms of the electromagnetic potentials (P; parity, T; time reversal) are induced and lead an unusual phenomenon in P- and T-violating superconductors discovered recently. The Ginzburg-Landau action includes this term in the gauge invariant manner. The coefficient of the term is nearly topological invariant with a small correction and equals to the fine structure constant approximately. Unusual ``Hall effect'' {\it without external} magnetic field could be observed by SQUID.

5 pages, 1 figure, accepted for publication in Phys. Lett. A

References in corpus (3)

• Time-Reversal Symmetry Breaking Superconductivity in Sr2RuO4
• On edge states in superconductor with time inversion symmetry breaking
• E-B Mixing in T-violating Superconductors

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