Absence of paramagnetic limits for Hc211 in layered superconductors without inversion center
Bulaevskii L.N. , Rusinov A.I.
It is shown that the reason why the paramagnetic limit of the upper critical magnetic field parallel to the layers is exceeded in the layered superconductors TaS2(Py)i/2 and NbSe2 may be the spin-orbit interaction in a lattice without symmetry center.