We show in this letter that P- and T-odd terms of the electromagnetic poten
tials (P; parity, Tt time reversal) are induced and lead an unusual phenome
non in P- and T-violating superconductors discovered recently. The Ginzburg
-Landau action includes this term in a gauge invariant manner. The coeffici
ent of the term is nearly topological invariant with a small correction and
equals to the fine structure constant approximately. The unusual 'Hall eff
ect' without external magnetic field could be observed by a SQUID. (C) 1999
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