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

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

1998-12-29

arxiv.org/abs/cond-mat/9812412v4

Phys.Lett. A260 (1999) 294-299

Physics

Condensed Matter

Superconductivity

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

Scientific paper

10.1016/S0375-9601(99)00538-1

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.

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